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  • 10:42 Path Counting Brain Teaser

    Path Counting Brain Teaser

    / 259 views

    Counting paths in a square More free lessons at: http://www.khanacademy.org/video?v=9QduzzW10uA

  • 11:19 Light Bulb Switching Brain Teaser

    Light Bulb Switching Brain Teaser

    / 305 views

    Turning light bulbs on and off. More free lessons at: http://www.khanacademy.org/video?v=WNhxkpmVQYw

  • 12:09 Forehead Numbers Brain Teaser

    Forehead Numbers Brain Teaser

    / 282 views

    The perfect logicians are at it again. More free lessons at: http://www.khanacademy.org/video?v=jqpQPxWj8gE

  • 11:01 Blue Forehead Room Solution

    Blue Forehead Room Solution

    / 311 views

    Do not watch before Blue Forehead Room. THIS IS THE SOLUTION! More free lessons at: http://www.khanacademy.org/video?v=-xYkTJFbuM0

  • 07:25 Brain Teaser: Blue Forehead Room

    Brain Teaser: Blue Forehead Room

    / 304 views

    What happens when 100 perfect logicians have to figure out if they each have a blue forehead? More free lessons at: http://www.khanacademy.org/video?v=rBaCDC52NOY

  • 16:59 Alien Abduction Brain Teaser

    Alien Abduction Brain Teaser

    / 319 views

    Saving Earth from becoming a mushroom farm. More free lessons at: http://www.khanacademy.org/video?v=K4pocYXOmTQ

  • 11:13 Toggler Brain Teaser

    Toggler Brain Teaser

    / 316 views

    Separating the truthteller from the togglers! More free lessons at: http://www.khanacademy.org/video?v=l3OkPYhDi9w

  • 06:50 Liar Truthteller Brain Teaser

    Liar Truthteller Brain Teaser

    / 269 views

    How to get correct advice when you can only ask one question from either a liar or a truthteller (when you don't know who is what) More free lessons at: http://www.khanacademy.org/video?v=69rDtSpshAw

  • 14:07 EBITDA

    EBITDA

    / 137 views

    Review of Enterprise Value and comparing it to EBITDA More free lessons at: http://www.khanacademy.org/video?v=v4Fq9LEspzw

  • 17:29 Enterprise Value

    Enterprise Value

    / 137 views

    Solving the P/E conundrum by looking at a different valuation metric (enterprise value) More free lessons at: http://www.khanacademy.org/video?v=pa92UdJCaos

  • 13:41 P/E Conundrum

    P/E Conundrum

    / 144 views

    A situation where the price to earnings ratio seems to not fairly price an asset More free lessons at: http://www.khanacademy.org/video?v=VrFbXxkl9JU

  • 07:46 Amortization

    Amortization

    / 153 views

    Introduction to amortization More free lessons at: http://www.khanacademy.org/video?v=XfR3JSkSkJM

  • 12:33 Depreciation

    Depreciation

    / 150 views

    Depreciation a capital asset More free lessons at: http://www.khanacademy.org/video?v=a5sFUXkxyGc

  • 10:17 ROA Discussion 2

    ROA Discussion 2

    / 116 views

    More on the return on asset discussion. More free lessons at: http://www.khanacademy.org/video?v=R_5slDeVCQk

  • 10:31 ROA Discussion 1

    ROA Discussion 1

    / 144 views

    A discussion of the various ways to measure return on assets More free lessons at: http://www.khanacademy.org/video?v=Oh4H3BJX1ZI

  • 15:34 P/E Discussion

    P/E Discussion

    / 156 views

    Discussion of the price-to-earnings ratio More free lessons at: http://www.khanacademy.org/video?v=V-rko8jgJ9o

  • 14:47 Introduction to the Price-to-Earnings Ratio

    Introduction to the Price-to-Earnings Ratio

    / 160 views

    Price to Earnings Ration (or P/E ratio). More free lessons at: http://www.khanacademy.org/video?v=cppxO67e6eo

  • 10:15 Earnings and EPS

    Earnings and EPS

    / 144 views

    Earnings, EPS (earnings per share) and how they relate to the income statement and balance sheet More free lessons at: http://www.khanacademy.org/video?v=RouNXdkC0do

  • 15:27 Introduction to the Income Statement

    Introduction to the Income Statement

    / 136 views

    The income statement, revenue, gross profit, operating profit, net income, ROA and ROE. More free lessons at: http://www.khanacademy.org/video?v=Z7C4cz2HkeY

  • 11:56 Price and Market Capitalization

    Price and Market Capitalization

    / 161 views

    Introduction to price and market capitalization More free lessons at: http://www.khanacademy.org/video?v=fa-VZ-SDxgY

  • 07:38 Change of State Example

    Change of State Example

    / 153 views

    Specific Heat Capacity and Enthalpy of Vaporization example More free lessons at: http://www.khanacademy.org/video?v=tvO0358YUYM

  • 16:02 Vapor Pressure Example

    Vapor Pressure Example

    / 146 views

    Vapor pressure example using the Ideal Gas Law More free lessons at: http://www.khanacademy.org/video?v=-QpkmwIoMaY

  • 12:08 Hess's Law Example

    Hess's Law Example

    / 175 views

    Hess's Law Example More free lessons at: http://www.khanacademy.org/video?v=8bCL8TQZFKo

  • 12:43 Spectrophotometry Example

    Spectrophotometry Example

    / 140 views

    Spectrophotometry Example - Determining concentration based on absorbance More free lessons at: http://www.khanacademy.org/video?v=VqAa_cmZ7OY

  • 13:06 Spectrophotometry Introduction

    Spectrophotometry Introduction

    / 136 views

    Spectrophotometry, Transmittance, Absorbance and the Beer-Lambert Law More free lessons at: http://www.khanacademy.org/video?v=qbCZbP6_j48

  • 12:31 Acid Base Titration

    Acid Base Titration

    / 159 views

    Using acid-base titration to find mass of oxalic acid More free lessons at: http://www.khanacademy.org/video?v=XjFNmfLv9_Q

  • 10:34 Molecular and Empirical Forumlas from Percent Composition

    Molecular and Empirical Forumlas from Percent Composition

    / 141 views

    Molecular and Empirical Forumlas from Percent Composition. Example 2.9 from Kotz Chemistry book More free lessons at: http://www.khanacademy.org/video?v=_H009sTvYE0

  • 09:47 Another Stoichiometry Example in a Solution

    Another Stoichiometry Example in a Solution

    / 156 views

    Another Stoichiometry Example in a Solution More free lessons at: http://www.khanacademy.org/video?v=_qrQKBB2jt8

  • 10:18 Stoichiometry of a Reaction in Solution

    Stoichiometry of a Reaction in Solution

    / 243 views

    Stoichiometry of a Reaction in Solution More free lessons at: http://www.khanacademy.org/video?v=EKZSwjVR594

  • 17:41 Example of Finding Reactant Empirical Formula

    Example of Finding Reactant Empirical Formula

    / 269 views

    Example of Finding Reactant Empirical Formula More free lessons at: http://www.khanacademy.org/video?v=66ziUq6vRko

  • 16:45 Empirical and Molecular Formulas from Stoichiometry

    Empirical and Molecular Formulas from Stoichiometry

    / 186 views

    Empirical and Molecular Formulas from Stoichiometry More free lessons at: http://www.khanacademy.org/video?v=FycJ8X67xEU

  • 19:20 Limiting Reactant Example Problem 1

    Limiting Reactant Example Problem 1

    / 187 views

    Limiting Reactant Example Problem 1

  • 18:53 Stoichiometry Example Problem 2

    Stoichiometry Example Problem 2

    / 180 views

    Stoichiometry Example Problem 2 More free lessons at: http://www.khanacademy.org/video?v=eQf_EAYGo-k

  • 13:35 Stoichiometry Example Problem 1

    Stoichiometry Example Problem 1

    / 175 views

    Figuring grams of reactants and product produced from reaction of phosphorous and chlorine More free lessons at: http://www.khanacademy.org/video?v=jFv6k2OV7IU

  • 06:41 A look at a seductive but wrong Gibbs/Spontaneity Proof

    A look at a seductive but wrong Gibbs/Spontaneity Proof

    / 175 views

    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=yYbzJs6vgv8

  • 13:56 More rigorous Gibbs Free Energy/ Spontaneity Relationship

    More rigorous Gibbs Free Energy/ Spontaneity Relationship

    / 171 views

    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=7aur5h44pV4

  • 09:57 Gibbs Free Energy Example

    Gibbs Free Energy Example

    / 199 views

    Determining if a reaction is spontaneous by calculating the change in Gibbs Free Energy. More free lessons at: http://www.khanacademy.org/video?v=sG1ZAdYi13A

  • 17:40 Gibbs Free Energy and Spontaneity

    Gibbs Free Energy and Spontaneity

    / 265 views

    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=ViAmQivKif0

  • 15:40 Hess's Law and Reaction Enthalpy Change

    Hess's Law and Reaction Enthalpy Change

    / 166 views

    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=chXMpDwjBDk

  • 12:35 Heat of Formation

    Heat of Formation

    / 188 views

    Standard heat of formation or standard enthalpy change of formation. More free lessons at: http://www.khanacademy.org/video?v=PK_JXzYcme0

  • 15:07 Enthalpy

    Enthalpy

    / 141 views

    Understanding why enthalpy can be viewed as "heat content" in a constant pressure system. More free lessons at: http://www.khanacademy.org/video?v=fucyI7Ouj2c

  • 12:17 Carnot Efficiency 3:  Proving that it is the most efficient

    Carnot Efficiency 3: Proving that it is the most efficient

    / 147 views

    Proving that a Carnot Engine is the most efficient engine More free lessons at: http://www.khanacademy.org/video?v=LUoUb4hGMH8

  • 14:01 Carnot Efficiency 2:  Reversing the Cycle

    Carnot Efficiency 2: Reversing the Cycle

    / 157 views

    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=pQWwP7YYH6o

  • 14:04 Efficiency of a Carnot Engine

    Efficiency of a Carnot Engine

    / 191 views

    Definition of efficiency for a heat engine. Efficiency of a Carnot Engine. More free lessons at: http://www.khanacademy.org/video?v=M_5KYncYNyc

  • 08:56 More on Entropy

    More on Entropy

    / 151 views

    More clarification as to what entropy is and what entropy is not. More free lessons at: http://www.khanacademy.org/video?v=dFFzAP2OZ3E

  • 13:27 Maxwell's Demon

    Maxwell's Demon

    / 185 views

    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=aKRDvSZ-igA

  • 19:15 Entropy Intuition

    Entropy Intuition

    / 152 views

    A discussion of what entropy is and what it isn't. More free lessons at: http://www.khanacademy.org/video?v=xJf6pHqLzs0

  • 28:26 Reconciling Thermodynamic and State Definitions of Entropy

    Reconciling Thermodynamic and State Definitions of Entropy

    / 140 views

    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=WLKEVfLFau4

  • 15:38 Thermodynamic Entropy Definition Clarification

    Thermodynamic Entropy Definition Clarification

    / 139 views

    Clarifying that the thermodynamic definition of Entropy requires a reversible system. More free lessons at: http://www.khanacademy.org/video?v=PFcGiMLwjeY

  • 15:38 Proof: S (or Entropy) is a valid state variable

    Proof: S (or Entropy) is a valid state variable

    / 191 views

    Prroof that S (or entropy) is a valid state variable. More free lessons at: http://www.khanacademy.org/video?v=sPz5RrFus1Q

  • 17:08 Proof: Volume Ratios in a Carnot Cycle

    Proof: Volume Ratios in a Carnot Cycle

    / 198 views

    Proof of the volume ratios in a Carnot Cycle More free lessons at: http://www.khanacademy.org/video?v=ixRtSV3CXPA

  • 20:53 Carnot Cycle and Carnot Engine

    Carnot Cycle and Carnot Engine

    / 225 views

    Introduction to the Carnot Cycle and Carnot Heat Engine More free lessons at: http://www.khanacademy.org/video?v=aAfBSJObd6Y

  • 19:03 Work Done by Isothermic Process

    Work Done by Isothermic Process

    / 178 views

    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=iiFWoXQPOJc

  • 16:56 Proof: U=(3/2)PV or U=(3/2)nRT

    Proof: U=(3/2)PV or U=(3/2)nRT

    / 220 views

    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=qSFY7GKhSRs

  • 15:24 PV-diagrams and Expansion Work

    PV-diagrams and Expansion Work

    / 181 views

    Why work from expansion is the area under the curve of a PV-diagram More free lessons at: http://www.khanacademy.org/video?v=M5uOIy-JTmo

  • 12:43 Work from Expansion

    Work from Expansion

    / 194 views

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

  • 13:45 More on Internal Energy

    More on Internal Energy

    / 148 views

    Getting more intuition of internal energy, heat, and work More free lessons at: http://www.khanacademy.org/video?v=aOSlXuDO4UU

  • 17:40 First Law of Thermodynamics/ Internal Energy

    First Law of Thermodynamics/ Internal Energy

    / 196 views

    First law of thermodynamic and Internal Energy More free lessons at: http://www.khanacademy.org/video?v=Xb05CaG7TsQ

  • 14:37 Quasistatic and Reversible Processes

    Quasistatic and Reversible Processes

    / 133 views

    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-10ysDb4

  • 18:30 Macrostates and Microstates

    Macrostates and Microstates

    / 155 views

    The difference between macrostates and microstates. Thermodynamic equilibrium. More free lessons at: http://www.khanacademy.org/video?v=5EU-y1VF7g4

  • 07:22 More Exponential Decay Examples

    More Exponential Decay Examples

    / 149 views

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

  • 09:19 Introduction to Exponential Decay

    Introduction to Exponential Decay

    / 145 views

    Introduction to Exponential Decay More free lessons at: http://www.khanacademy.org/video?v=HTDop6eEsaA

  • 12:22 Exponential Decay Formula Proof (can skip, involves Calculus)

    Exponential Decay Formula Proof (can skip, involves Calculus)

    / 227 views

    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: http://www.khanacademy.org/video?v=H7nrVDV8ahc

  • 12:31 Half-Life

    Half-Life

    / 217 views

    Introduction to half-life More free lessons at: http://www.khanacademy.org/video?v=9REPnibO4IQ

  • 17:03 Types of Decay

    Types of Decay

    / 164 views

    Alpha, Beta, Gamma Decay and Positron Emission More free lessons at: http://www.khanacademy.org/video?v=3koOwozY4oc

  • 18:26 Galvanic Cells

    Galvanic Cells

    / 164 views

    Redox reactions to drive Galvanic Cells.

  • 14:26 Redox Reactions

    Redox Reactions

    / 237 views

    Oxidation reduction (or redox) reactions

  • 02:22 Hydrogen Peroxide Correction

    Hydrogen Peroxide Correction

    / 161 views

    Correcting an error in the last video regarding hydrogen peroxide.

  • 17:29 More on Oxidation States

    More on Oxidation States

    / 163 views

    More practice calculating oxidation states

  • 17:39 Introduction to Oxidation States

    Introduction to Oxidation States

    / 153 views

    Oxidation and reduction. Oxidation states.

  • 11:02 Titration Roundup

    Titration Roundup

    / 117 views

    Making sure you fully understand titration curves More free lessons at: http://www.khanacademy.org/video?v=BBIGR0RAMtY

  • 10:24 Weak Acid Titration

    Weak Acid Titration

    / 132 views

    Equivalence point when titrating a weak acid More free lessons at: http://www.khanacademy.org/video?v=gbpc_JBG1F0

  • 12:17 Strong Acid Titration

    Strong Acid Titration

    / 144 views

    Strong acid titration and equivalence point More free lessons at: http://www.khanacademy.org/video?v=299o6c-Fkz4

  • 14:55 Buffers and Hendersen-Hasselbalch

    Buffers and Hendersen-Hasselbalch

    / 150 views

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

  • 14:33 pKa and pKb Relationship

    pKa and pKb Relationship

    / 195 views

    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=3Gm4nAAc3zc

  • 16:46 Conjugate Acids and Bases

    Conjugate Acids and Bases

    / 154 views

    Introduction to conjugate acids and bases More free lessons at: http://www.khanacademy.org/video?v=0LM6wPpypxM

  • 13:00 pH of a Weak Base

    pH of a Weak Base

    / 153 views

    pH of .2 M of NH3 (weak base). More free lessons at: http://www.khanacademy.org/video?v=gDJtOIxDu78

  • 17:49 pH of a Weak Acid

    pH of a Weak Acid

    / 132 views

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

  • 14:49 pH, pOH of Strong Acids and Bases

    pH, pOH of Strong Acids and Bases

    / 180 views

    Calculating the pH or pOH of strong acids and bases. More free lessons at: http://www.khanacademy.org/video?v=tS2YJPmKOFQ

  • 18:37 Acid Base Introduction

    Acid Base Introduction

    / 143 views

    Arrhenius, Bronsted Lowry, and Lewis Acids and Bases. More free lessons at: http://www.khanacademy.org/video?v=vShCnTY1-T0

  • 18:09 Introduction to pH, pOH, and pKw

    Introduction to pH, pOH, and pKw

    / 199 views

    Autoionization of water into hydronium and hydroxide ions. pH, pOH, and pKa. More free lessons at: http://www.khanacademy.org/video?v=2q4vSKwaBtw

  • 14:43 Le Chatelier's Principle

    Le Chatelier's Principle

    / 175 views

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

  • 09:22 Heterogenous Equilibrium

    Heterogenous Equilibrium

    / 165 views

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

  • 15:50 Keq derivation intuition (can skip; bit mathy)

    Keq derivation intuition (can skip; bit mathy)

    / 157 views

    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=psLX080RQR8

  • 12:52 Keq Intuition (mathy and not necessary to progress)

    Keq Intuition (mathy and not necessary to progress)

    / 173 views

    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=ONBJo7dXJm8

  • 03:04 Mini-Video on Ion Size

    Mini-Video on Ion Size

    / 190 views

    Correcting a mistake and learning a bit about ion size More free lessons at: http://www.khanacademy.org/video?v=HBi8xjMchZc

  • 14:51 Reactions in Equilibrium

    Reactions in Equilibrium

    / 177 views

    Equilibrium reactions and constants. More free lessons at: http://www.khanacademy.org/video?v=CGJjjm7-DJ4

  • 15:27 Introduction to Kinetics

    Introduction to Kinetics

    / 170 views

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

  • 14:00 Boiling Point Elevation and Freezing Point Supression

    Boiling Point Elevation and Freezing Point Supression

    / 167 views

    Raising or lowering the boiling or freezing point of a solution by adding solute. More free lessons at: http://www.khanacademy.org/video?v=z9LxdqYntlU

  • 13:22 Solubility

    Solubility

    / 165 views

    Solubility of salt and gas solutes in liquid solvent. More free lessons at: http://www.khanacademy.org/video?v=zjIVJh4JLNo

  • 13:57 Suspensions, Colloids and Solutions

    Suspensions, Colloids and Solutions

    / 212 views

    Suspensions, Colloids and Solutions. The difference between Molarity and Molality. More free lessons at: http://www.khanacademy.org/video?v=3ROWXs3jtQU

  • 18:04 Vapor Pressure

    Vapor Pressure

    / 158 views

    Vapor Pressure, Volatility, and Evaporation More free lessons at: http://www.khanacademy.org/video?v=hA5jddDYcyg

  • 09:14 Covalent Networks, Metallic, and Ionic Crystals

    Covalent Networks, Metallic, and Ionic Crystals

    / 198 views

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

  • 11:39 Van Der Waals Forces

    Van Der Waals Forces

    / 210 views

    Van Der Waals Forces: London Dispersion Forces, Dipole Attractions, and Hydrogen Bonds. More free lessons at: http://www.khanacademy.org/video?v=8qfzpJvsp04

  • 12:36 Phase Diagrams

    Phase Diagrams

    / 154 views

    Understanding and interpreting phase diagrams More free lessons at: http://www.khanacademy.org/video?v=Qp87Z4m8R-w

  • 11:23 Chilling Water Problem

    Chilling Water Problem

    / 239 views

    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=lsXcKgjg8Hs

  • 14:49 Specific Heat, Heat of Fusion and Vaporization

    Specific Heat, Heat of Fusion and Vaporization

    / 201 views

    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=zz4KbvF_X-0

  • 08:45 States of Matter Follow-Up

    States of Matter Follow-Up

    / 251 views

    More on Plasma and Hydrogen bonds. More free lessons at: http://www.khanacademy.org/video?v=WenwtcuqOj8

  • 15:09 Partial Pressure

    Partial Pressure

    / 135 views

    Figuring out the partial pressures of various gases in a container. More free lessons at: http://www.khanacademy.org/video?v=d4bqNf37mBY

  • 05:04 Ideal Gas Example 4

    Ideal Gas Example 4

    / 167 views

    Figuring out the molar mass of a mystery molecule at STP. More free lessons at: http://www.khanacademy.org/video?v=Osl6HEDZZ-E

  • 05:46 Ideal Gas Equation Example 3

    Ideal Gas Equation Example 3

    / 154 views

    Figuring out the mass of Oxygen we have. More free lessons at: http://www.khanacademy.org/video?v=69V-60sga3M

  • 13:01 Ideal Gas Equation Example 2

    Ideal Gas Equation Example 2

    / 171 views

    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_BemwHs

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