Khan Academy
Khan Academy: Chemistry: A Look at an Incorrect Gibbs/spontaneity Proof
A video lecture exploring how a derivation of the Gibb's free energy equation shown in some textbooks makes an incorrect assumption. The proof defines entropy as an irreversible transfer of heat which is incorrect and causes the basis...
Khan Academy
Khan Academy: Chemistry: Molecular and Empirical Formulas
A video lecture explaining how to find the molecular and empirical formula knowing the percent composition of each element. The problem is solved in easy to follow steps. [9:30]
Khan Academy
Khan Academy: Chemistry: Introduction to Exponential Decay
A video lecture showing how to apply the exponential decay equation to solve for either the amount of atoms left at a particular time or the half life of a compound. Video gives a detailed explanation of problems as they are being...
Khan Academy
Khan Academy: Chemistry: Thermodynamic Entropy Definition Clarification
Understand that thermodynamic entropy does not deal with the heat added and the different temperatures at which it is added but rather the reversible heat and temperature to calculate the change in entropy. This video lecture reminds...
Khan Academy
Khan Academy: Chemistry: First Law of Thermodynamics/internal Energy
A video lecture defining the first law of thermodynamics and internal energy. Understand that energy is only transferred from one form to another and not created or destroyed. Also learn how measure the amount of energy something has as...
Khan Academy
Khan Academy: Chemistry: Entropy Intuition
A video lecture to explain what entropy is and what it isn't. Two definition of entropy are introduced and explored to show how they can be reconciled. Also investigated is the second law of thermodynamics and its relationship to...