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Chemistry - Khan Academy FREE

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updated 10/27/2015

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Videos on chemistry (roughly covering a first-year high school or college course).

Lessons
1) Elements and Atoms How elements relate to atoms. The basics of how protons, electrons and neutrons make up an atom. More free lessons at: http://www.khanacademy.org/video?v=IFKnq 478 views watch video
2) Introduction to the atom The atom, proton, neutron and electron More free lessons at: http://www.khanacademy.org/video?v=1xSQl 462 views watch video
3) Orbitals An introduction to orbitals More free lessons at: http://www.khanacademy.org/video?v=yBrp8 537 views watch video
4) More on orbitals and electron configuration More intuition on orbitals. Touching on electron configuration. More free lessons at: http://www.khanacademy.org/video?v=FmQoS 501 views watch video
5) Electron Configurations Introduction to using the periodic table to determine electron configurations 421 views watch video
6) Electron Configurations 2 Figuring out configurations for the d-block elements More free lessons at: http://www.khanacademy.org/video?v=YURRe 478 views watch video
7) Valence Electrons Looking at valence electrons to figure out reactivity More free lessons at: http://www.khanacademy.org/video?v=1TZA1 473 views watch video
8) Groups of the Periodic Table Properties of alkali, alkaline earth and transition metals. Halogens and noble gases. More free lessons at: http://www.khanacademy.org/video?v=LDHg7 457 views watch video
9) Periodic Table Trends: Ionization Energy What an ion is. Using the periodic table to understand how difficult it is to ionize an atom. More free lessons at: http://www.khanacademy.org/video?v=ywqg9 497 views watch video
10) Other Periodic Table Trends Electronegativity, metallic nature and atomic radius. 449 views watch video
11) Ionic, Covalent, and Metallic Bonds Introduction to ionic, covalent, polar covalent and metallic bonds. More free lessons at: http://www.khanacademy.org/video?v=CGA8s 542 views watch video
12) Molecular and Empirical Formulas Introduction to molecular and empirical formulas. Calculating molecular mass. More free lessons at: http://www.khanacademy.org/video?v=gfBcM 501 views watch video
13) The Mole and Avogadro's Number Introduction to the idea of a mole as a number (vs. an animal) More free lessons at: http://www.khanacademy.org/video?v=AsqEk 555 views watch video
14) Formula from Mass Composition Figuring out the empirical formula from a molecules mass composition 423 views watch video
15) Another mass composition problem Another exercise converting a mass composition to an empirical formula. More free lessons at: http://www.khanacademy.org/video?v=sXOII 491 views watch video
16) Balancing Chemical Equations The art of balancing equations in chemistry! More free lessons at: http://www.khanacademy.org/video?v=RnGu3 520 views watch video
17) Stoichiometry Introduction to stoichiometry More free lessons at: http://www.khanacademy.org/video?v=SjQG3 498 views watch video
18) Stoichiometry: Limiting Reagent Stoichiometry problem where we have a limiting reagent! More free lessons at: http://www.khanacademy.org/video?v=rESzy 474 views watch video
19) Ideal Gas Equation: PV=nRT Intuition behind the ideal gas equation: PV=nRT. More free lessons at: http://www.khanacademy.org/video?v=WScwP 498 views watch video
20) Ideal Gas Equation Example 1 Figuring out the number of moles of gas we have using the ideal gas equation: PV=nRT. More free lessons at: http://www.khanacademy.org/video?v=erjMi 487 views watch video
21) Ideal Gas Equation Example 2 PV/T is a constant. Figuring out the volume of an ideal gas at standard temperature and pressure (STP). More free lessons at: http://www.khanacademy.org/video?v=GwoX_ 462 views watch video
22) Ideal Gas Equation Example 3 Figuring out the mass of Oxygen we have. More free lessons at: http://www.khanacademy.org/video?v=69V-6 520 views watch video
23) Ideal Gas Example 4 Figuring out the molar mass of a mystery molecule at STP. More free lessons at: http://www.khanacademy.org/video?v=Osl6H 504 views watch video
24) Partial Pressure Figuring out the partial pressures of various gases in a container. More free lessons at: http://www.khanacademy.org/video?v=d4bqN 468 views watch video
25) States of Matter Introduction to the states or phases of matter. More free lessons at: http://www.khanacademy.org/video?v=pKvo0 498 views watch video
26) States of Matter Follow-Up More on Plasma and Hydrogen bonds. More free lessons at: http://www.khanacademy.org/video?v=Wenwt 527 views watch video
27) Specific Heat, Heat of Fusion and Vaporization Specifict heat and phase changes: Calculating how much heat is needed to convert 200g of ice at -10C to 110 degree steam. More free lessons at: http://www.khanacademy.org/video?v=zz4Kb 484 views watch video
28) Chilling Water Problem How much ice at -10 degrees C is necessary to get 500g of water down to 0 degrees C? More free lessons at: http://www.khanacademy.org/video?v=lsXcK 563 views watch video
29) Phase Diagrams Understanding and interpreting phase diagrams More free lessons at: http://www.khanacademy.org/video?v=Qp87Z 598 views watch video
30) Van Der Waals Forces Van Der Waals Forces: London Dispersion Forces, Dipole Attractions, and Hydrogen Bonds. More free lessons at: http://www.khanacademy.org/video?v=8qfzp 575 views watch video
31) Covalent Networks, Metallic, and Ionic Crystals Covalent Networks, Metallic, and Ionic Crystals: Some of the strongest molecular structures. More free lessons at: http://www.khanacademy.org/video?v=Rw_pD 456 views watch video
32) Vapor Pressure Vapor Pressure, Volatility, and Evaporation More free lessons at: http://www.khanacademy.org/video?v=hA5jd 539 views watch video
33) Suspensions, Colloids and Solutions Suspensions, Colloids and Solutions. The difference between Molarity and Molality. More free lessons at: http://www.khanacademy.org/video?v=3ROWX 516 views watch video
34) Solubility Solubility of salt and gas solutes in liquid solvent. More free lessons at: http://www.khanacademy.org/video?v=zjIVJ 483 views watch video
35) Boiling Point Elevation and Freezing Point Supression Raising or lowering the boiling or freezing point of a solution by adding solute. More free lessons at: http://www.khanacademy.org/video?v=z9Lxd 433 views watch video
36) Introduction to Kinetics Kinetics, activation energy, activated complex and catalysts. More free lessons at: http://www.khanacademy.org/video?v=__zy- 468 views watch video
37) Reactions in Equilibrium Equilibrium reactions and constants. More free lessons at: http://www.khanacademy.org/video?v=CGJjj 533 views watch video
38) Mini-Video on Ion Size Correcting a mistake and learning a bit about ion size More free lessons at: http://www.khanacademy.org/video?v=HBi8x 620 views watch video
39) Keq Intuition (mathy and not necessary to progress) A probabilistic look at how molecules react to develop the intuition behind the equilibrium constant formula. More free lessons at: http://www.khanacademy.org/video?v=ONBJo 489 views watch video
40) Keq derivation intuition (can skip; bit mathy) A more concrete attempt at showing how the probabilities of molecules reacting is related to their concentration. More free lessons at: http://www.khanacademy.org/video?v=psLX0 498 views watch video
41) Heterogenous Equilibrium Ignoring the solution or the solid state molecules when calculating the equilibrium constant. More free lessons at: http://www.khanacademy.org/video?v=TsXlT 495 views watch video
42) Le Chatelier's Principle Le Chatelier's Principle regarding the "stressing" of reactions in equilibrium More free lessons at: http://www.khanacademy.org/video?v=4-fEv 491 views watch video
43) Introduction to pH, pOH, and pKw Autoionization of water into hydronium and hydroxide ions. pH, pOH, and pKa. More free lessons at: http://www.khanacademy.org/video?v=2q4vS 517 views watch video
44) Acid Base Introduction Arrhenius, Bronsted Lowry, and Lewis Acids and Bases. More free lessons at: http://www.khanacademy.org/video?v=vShCn 458 views watch video
45) pH, pOH of Strong Acids and Bases Calculating the pH or pOH of strong acids and bases. More free lessons at: http://www.khanacademy.org/video?v=tS2YJ 452 views watch video
46) pH of a Weak Acid Calculating the pH of a weak acid More free lessons at: http://www.khanacademy.org/video?v=dencu 455 views watch video
47) pH of a Weak Base pH of .2 M of NH3 (weak base). More free lessons at: http://www.khanacademy.org/video?v=gDJtO 488 views watch video
48) Conjugate Acids and Bases Introduction to conjugate acids and bases More free lessons at: http://www.khanacademy.org/video?v=0LM6w 467 views watch video
49) pKa and pKb Relationship The pKa and pKb relationship between conjugate acids and bases (both of which are weak). More free lessons at: http://www.khanacademy.org/video?v=3Gm4n 425 views watch video
50) Buffers and Hendersen-Hasselbalch Buffers and the Hendersen-Hasselbalch equation More free lessons at: http://www.khanacademy.org/video?v=LJmFb 455 views watch video
51) Strong Acid Titration Strong acid titration and equivalence point More free lessons at: http://www.khanacademy.org/video?v=299o6 479 views watch video
52) Weak Acid Titration Equivalence point when titrating a weak acid More free lessons at: http://www.khanacademy.org/video?v=gbpc_ 500 views watch video
53) Titration Roundup Making sure you fully understand titration curves More free lessons at: http://www.khanacademy.org/video?v=BBIGR 456 views watch video
54) Introduction to Oxidation States Oxidation and reduction. Oxidation states. 443 views watch video
55) More on Oxidation States More practice calculating oxidation states 441 views watch video
56) Hydrogen Peroxide Correction Correcting an error in the last video regarding hydrogen peroxide. 476 views watch video
57) Redox Reactions Oxidation reduction (or redox) reactions 465 views watch video
58) Galvanic Cells Redox reactions to drive Galvanic Cells. 453 views watch video
59) Types of Decay Alpha, Beta, Gamma Decay and Positron Emission More free lessons at: http://www.khanacademy.org/video?v=3koOw 408 views watch video
60) Half-Life Introduction to half-life More free lessons at: http://www.khanacademy.org/video?v=9REPn 500 views watch video
61) Exponential Decay Formula Proof (can skip, involves Calculus) Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class. More free lessons at ... 459 views watch video
62) Introduction to Exponential Decay Introduction to Exponential Decay More free lessons at: http://www.khanacademy.org/video?v=HTDop 475 views watch video
63) More Exponential Decay Examples A few more examples of exponential decay. More free lessons at: http://www.khanacademy.org/video?v=Hqzak 452 views watch video
64) Macrostates and Microstates The difference between macrostates and microstates. Thermodynamic equilibrium. More free lessons at: http://www.khanacademy.org/video?v=5EU-y 506 views watch video
65) Quasistatic and Reversible Processes Using theoretically quasi-static and/or reversible processes to stay pretty much at equilibrium. More free lessons at: http://www.khanacademy.org/video?v=lKq-1 444 views watch video
66) First Law of Thermodynamics/ Internal Energy First law of thermodynamic and Internal Energy More free lessons at: http://www.khanacademy.org/video?v=Xb05C 641 views watch video
67) More on Internal Energy Getting more intuition of internal energy, heat, and work More free lessons at: http://www.khanacademy.org/video?v=aOSlX 461 views watch video
68) Work from Expansion How a system can do work by expanding More free lessons at: http://www.khanacademy.org/video?v=obeGV 480 views watch video
69) PV-diagrams and Expansion Work Why work from expansion is the area under the curve of a PV-diagram More free lessons at: http://www.khanacademy.org/video?v=M5uOI 468 views watch video
70) Proof: U=(3/2)PV or U=(3/2)nRT Conceptual proof that the internal energy of an ideal gas system is 3/2 PV. More free lessons at: http://www.khanacademy.org/video?v=qSFY7 494 views watch video
71) Work Done by Isothermic Process Isothermic and Adiabatic processes. Calculating the work done by an isothermic process. Seeing that it is the same as the heat added. More free lessons at: http://www.khanacademy.org/video?v=iiFWo ... 443 views watch video
72) Carnot Cycle and Carnot Engine Introduction to the Carnot Cycle and Carnot Heat Engine More free lessons at: http://www.khanacademy.org/video?v=aAfBS 527 views watch video
73) Proof: Volume Ratios in a Carnot Cycle Proof of the volume ratios in a Carnot Cycle More free lessons at: http://www.khanacademy.org/video?v=ixRtS 459 views watch video
74) Proof: S (or Entropy) is a valid state variable Prroof that S (or entropy) is a valid state variable. More free lessons at: http://www.khanacademy.org/video?v=sPz5R 486 views watch video
75) Thermodynamic Entropy Definition Clarification Clarifying that the thermodynamic definition of Entropy requires a reversible system. More free lessons at: http://www.khanacademy.org/video?v=PFcGi 555 views watch video
76) Reconciling Thermodynamic and State Definitions of Entropy Long video explaining why entropy is a measure of the number of states a system can take on (mathy, but mind-blowing). More free lessons at: http://www.khanacademy.org/video?v=WLKEV 474 views watch video
77) Entropy Intuition A discussion of what entropy is and what it isn't. More free lessons at: http://www.khanacademy.org/video?v=xJf6p 520 views watch video
78) Maxwell's Demon Maxwell's Demon: A thought experiment that seems to defy the 2nd Law of Thermodynamics More free lessons at: http://www.khanacademy.org/video?v=aKRDv 452 views watch video
79) More on Entropy More clarification as to what entropy is and what entropy is not. More free lessons at: http://www.khanacademy.org/video?v=dFFzA 658 views watch video
80) Efficiency of a Carnot Engine Definition of efficiency for a heat engine. Efficiency of a Carnot Engine. More free lessons at: http://www.khanacademy.org/video?v=M_5KY 516 views watch video
81) Carnot Efficiency 2: Reversing the Cycle Seeing how we can scale and or reverse a Carnot Engine (to make a refrigerator) More free lessons at: http://www.khanacademy.org/video?v=pQWwP 507 views watch video
82) Carnot Efficiency 3: Proving that it is the most efficient Proving that a Carnot Engine is the most efficient engine More free lessons at: http://www.khanacademy.org/video?v=LUoUb 499 views watch video
83) Enthalpy Understanding why enthalpy can be viewed as "heat content" in a constant pressure system. More free lessons at: http://www.khanacademy.org/video?v=fucyI 482 views watch video
84) Heat of Formation Standard heat of formation or standard enthalpy change of formation. More free lessons at: http://www.khanacademy.org/video?v=PK_JX 582 views watch video
85) Hess's Law and Reaction Enthalpy Change Using Hess's Law and standard heats of formation to determine the enthalpy change for reactions More free lessons at: http://www.khanacademy.org/video?v=chXMp 467 views watch video
86) Gibbs Free Energy and Spontaneity Intuition behind why spontaneity is driven by enthalpy, entropy and temperature. Introduction to Gibbs free energy. More free lessons at: http://www.khanacademy.org/video?v=ViAmQ 570 views watch video
87) Gibbs Free Energy Example Determining if a reaction is spontaneous by calculating the change in Gibbs Free Energy. More free lessons at: http://www.khanacademy.org/video?v=sG1ZA 548 views watch video
88) More rigorous Gibbs Free Energy/ Spontaneity Relationship More formal understanding of why a negative change in Gibbs Free Energy implies a spontaneous, irreversible reaction. More free lessons at: http://www.khanacademy.org/video?v=7aur5 423 views watch video
89) A look at a seductive but wrong Gibbs/Spontaneity Proof A look at why the "proof" of the relation between changes in Gibbs Free Energy and Spontaneity is wrong in many textbooks. More free lessons at: http://www.khanacademy.org/video?v=yYbzJ 474 views watch video
90) Stoichiometry Example Problem 1 Figuring grams of reactants and product produced from reaction of phosphorous and chlorine More free lessons at: http://www.khanacademy.org/video?v=jFv6k 530 views watch video
91) Stoichiometry Example Problem 2 Stoichiometry Example Problem 2 More free lessons at: http://www.khanacademy.org/video?v=eQf_E 438 views watch video
92) Limiting Reactant Example Problem 1 Limiting Reactant Example Problem 1 386 views watch video
93) Empirical and Molecular Formulas from Stoichiometry Empirical and Molecular Formulas from Stoichiometry More free lessons at: http://www.khanacademy.org/video?v=FycJ8 408 views watch video
94) Example of Finding Reactant Empirical Formula Example of Finding Reactant Empirical Formula More free lessons at: http://www.khanacademy.org/video?v=66ziU 424 views watch video
95) Stoichiometry of a Reaction in Solution Stoichiometry of a Reaction in Solution More free lessons at: http://www.khanacademy.org/video?v=EKZSw 423 views watch video
96) Another Stoichiometry Example in a Solution Another Stoichiometry Example in a Solution More free lessons at: http://www.khanacademy.org/video?v=_qrQK 414 views watch video
97) Molecular and Empirical Forumlas from Percent Composition Molecular and Empirical Forumlas from Percent Composition. Example 2.9 from Kotz Chemistry book More free lessons at: http://www.khanacademy.org/video?v=_H009 466 views watch video
98) Acid Base Titration Using acid-base titration to find mass of oxalic acid More free lessons at: http://www.khanacademy.org/video?v=XjFNm 448 views watch video
99) Spectrophotometry Introduction Spectrophotometry, Transmittance, Absorbance and the Beer-Lambert Law More free lessons at: http://www.khanacademy.org/video?v=qbCZb 414 views watch video
100) Spectrophotometry Example Spectrophotometry Example - Determining concentration based on absorbance More free lessons at: http://www.khanacademy.org/video?v=VqAa_ 398 views watch video

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Chemistry - Khan Academy FREE

Lessons

How elements relate to atoms. The basics of how protons, electrons and neutrons make up an atom. More free lessons at: http://www.khanacademy.org/video?v=IFKnq

The atom, proton, neutron and electron More free lessons at: http://www.khanacademy.org/video?v=1xSQl

An introduction to orbitals More free lessons at: http://www.khanacademy.org/video?v=yBrp8

More intuition on orbitals. Touching on electron configuration. More free lessons at: http://www.khanacademy.org/video?v=FmQoS

Introduction to using the periodic table to determine electron configurations

Figuring out configurations for the d-block elements More free lessons at: http://www.khanacademy.org/video?v=YURRe

Looking at valence electrons to figure out reactivity More free lessons at: http://www.khanacademy.org/video?v=1TZA1

Properties of alkali, alkaline earth and transition metals. Halogens and noble gases. More free lessons at: http://www.khanacademy.org/video?v=LDHg7

What an ion is. Using the periodic table to understand how difficult it is to ionize an atom. More free lessons at: http://www.khanacademy.org/video?v=ywqg9

Electronegativity, metallic nature and atomic radius.

Introduction to ionic, covalent, polar covalent and metallic bonds. More free lessons at: http://www.khanacademy.org/video?v=CGA8s

Introduction to molecular and empirical formulas. Calculating molecular mass. More free lessons at: http://www.khanacademy.org/video?v=gfBcM

Introduction to the idea of a mole as a number (vs. an animal) More free lessons at: http://www.khanacademy.org/video?v=AsqEk

Figuring out the empirical formula from a molecules mass composition

Another exercise converting a mass composition to an empirical formula. More free lessons at: http://www.khanacademy.org/video?v=sXOII

The art of balancing equations in chemistry! More free lessons at: http://www.khanacademy.org/video?v=RnGu3

Introduction to stoichiometry More free lessons at: http://www.khanacademy.org/video?v=SjQG3

Stoichiometry problem where we have a limiting reagent! More free lessons at: http://www.khanacademy.org/video?v=rESzy

Intuition behind the ideal gas equation: PV=nRT. More free lessons at: http://www.khanacademy.org/video?v=WScwP

Figuring out the number of moles of gas we have using the ideal gas equation: PV=nRT. More free lessons at: http://www.khanacademy.org/video?v=erjMi

PV/T is a constant. Figuring out the volume of an ideal gas at standard temperature and pressure (STP). More free lessons at: http://www.khanacademy.org/video?v=GwoX_

Figuring out the mass of Oxygen we have. More free lessons at: http://www.khanacademy.org/video?v=69V-6

Figuring out the molar mass of a mystery molecule at STP. More free lessons at: http://www.khanacademy.org/video?v=Osl6H

Figuring out the partial pressures of various gases in a container. More free lessons at: http://www.khanacademy.org/video?v=d4bqN

Introduction to the states or phases of matter. More free lessons at: http://www.khanacademy.org/video?v=pKvo0

More on Plasma and Hydrogen bonds. More free lessons at: http://www.khanacademy.org/video?v=Wenwt

Specifict heat and phase changes: Calculating how much heat is needed to convert 200g of ice at -10C to 110 degree steam. More free lessons at: http://www.khanacademy.org/video?v=zz4Kb

How much ice at -10 degrees C is necessary to get 500g of water down to 0 degrees C? More free lessons at: http://www.khanacademy.org/video?v=lsXcK

Understanding and interpreting phase diagrams More free lessons at: http://www.khanacademy.org/video?v=Qp87Z

Van Der Waals Forces: London Dispersion Forces, Dipole Attractions, and Hydrogen Bonds. More free lessons at: http://www.khanacademy.org/video?v=8qfzp

Covalent Networks, Metallic, and Ionic Crystals: Some of the strongest molecular structures. More free lessons at: http://www.khanacademy.org/video?v=Rw_pD

Vapor Pressure, Volatility, and Evaporation More free lessons at: http://www.khanacademy.org/video?v=hA5jd

Suspensions, Colloids and Solutions. The difference between Molarity and Molality. More free lessons at: http://www.khanacademy.org/video?v=3ROWX

Solubility of salt and gas solutes in liquid solvent. More free lessons at: http://www.khanacademy.org/video?v=zjIVJ

Raising or lowering the boiling or freezing point of a solution by adding solute. More free lessons at: http://www.khanacademy.org/video?v=z9Lxd

Kinetics, activation energy, activated complex and catalysts. More free lessons at: http://www.khanacademy.org/video?v=__zy-

Equilibrium reactions and constants. More free lessons at: http://www.khanacademy.org/video?v=CGJjj

Correcting a mistake and learning a bit about ion size More free lessons at: http://www.khanacademy.org/video?v=HBi8x

A probabilistic look at how molecules react to develop the intuition behind the equilibrium constant formula. More free lessons at: http://www.khanacademy.org/video?v=ONBJo

A more concrete attempt at showing how the probabilities of molecules reacting is related to their concentration. More free lessons at: http://www.khanacademy.org/video?v=psLX0

Ignoring the solution or the solid state molecules when calculating the equilibrium constant. More free lessons at: http://www.khanacademy.org/video?v=TsXlT

Le Chatelier's Principle regarding the "stressing" of reactions in equilibrium More free lessons at: http://www.khanacademy.org/video?v=4-fEv

Autoionization of water into hydronium and hydroxide ions. pH, pOH, and pKa. More free lessons at: http://www.khanacademy.org/video?v=2q4vS

Arrhenius, Bronsted Lowry, and Lewis Acids and Bases. More free lessons at: http://www.khanacademy.org/video?v=vShCn

Calculating the pH or pOH of strong acids and bases. More free lessons at: http://www.khanacademy.org/video?v=tS2YJ

Calculating the pH of a weak acid More free lessons at: http://www.khanacademy.org/video?v=dencu

pH of .2 M of NH3 (weak base). More free lessons at: http://www.khanacademy.org/video?v=gDJtO

Introduction to conjugate acids and bases More free lessons at: http://www.khanacademy.org/video?v=0LM6w

The pKa and pKb relationship between conjugate acids and bases (both of which are weak). More free lessons at: http://www.khanacademy.org/video?v=3Gm4n

Buffers and the Hendersen-Hasselbalch equation More free lessons at: http://www.khanacademy.org/video?v=LJmFb

Strong acid titration and equivalence point More free lessons at: http://www.khanacademy.org/video?v=299o6

Equivalence point when titrating a weak acid More free lessons at: http://www.khanacademy.org/video?v=gbpc_

Making sure you fully understand titration curves More free lessons at: http://www.khanacademy.org/video?v=BBIGR

Oxidation and reduction. Oxidation states.

More practice calculating oxidation states

Correcting an error in the last video regarding hydrogen peroxide.

Oxidation reduction (or redox) reactions

Redox reactions to drive Galvanic Cells.

Alpha, Beta, Gamma Decay and Positron Emission More free lessons at: http://www.khanacademy.org/video?v=3koOw

Introduction to half-life More free lessons at: http://www.khanacademy.org/video?v=9REPn

Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class. More free lessons at ...

Introduction to Exponential Decay More free lessons at: http://www.khanacademy.org/video?v=HTDop

A few more examples of exponential decay. More free lessons at: http://www.khanacademy.org/video?v=Hqzak

The difference between macrostates and microstates. Thermodynamic equilibrium. More free lessons at: http://www.khanacademy.org/video?v=5EU-y

Using theoretically quasi-static and/or reversible processes to stay pretty much at equilibrium. More free lessons at: http://www.khanacademy.org/video?v=lKq-1

First law of thermodynamic and Internal Energy More free lessons at: http://www.khanacademy.org/video?v=Xb05C

Getting more intuition of internal energy, heat, and work More free lessons at: http://www.khanacademy.org/video?v=aOSlX

How a system can do work by expanding More free lessons at: http://www.khanacademy.org/video?v=obeGV

Why work from expansion is the area under the curve of a PV-diagram More free lessons at: http://www.khanacademy.org/video?v=M5uOI

Conceptual proof that the internal energy of an ideal gas system is 3/2 PV. More free lessons at: http://www.khanacademy.org/video?v=qSFY7

Isothermic and Adiabatic processes. Calculating the work done by an isothermic process. Seeing that it is the same as the heat added. More free lessons at: http://www.khanacademy.org/video?v=iiFWo ...

Introduction to the Carnot Cycle and Carnot Heat Engine More free lessons at: http://www.khanacademy.org/video?v=aAfBS

Proof of the volume ratios in a Carnot Cycle More free lessons at: http://www.khanacademy.org/video?v=ixRtS

Prroof that S (or entropy) is a valid state variable. More free lessons at: http://www.khanacademy.org/video?v=sPz5R