R1.4 (AHL) Entropy & spontaneity
This page covers entropy which is a measure of the dispersal or distribution of matter and/or energy in a system and relates it to the Gibbs energy, using the expression ΔG⦵ = ΔH⦵ − TΔS⦵, to determine whether a reaction is spontaneous or non-spontaneous at a stated temperature. It also relates the value of ΔG to the reaction quotient and equilibrium constant. What determines the direction of chemical change? Entropy...