Enthalpy, Entropy And Free Energy Flashcards
1
Q
Entropy
A
The entropy, S, of a system is a measure of the disorder or randomness of a system.
Unit: JK-1mol-1
2
Q
Standard entropy
A
The standard entropy, of a substance is the entropy content of one mole of a substance, under standard conditions ie 25°C, 1atm pressure and with substance in their normal physical states under these conditions
3
Q
Feasible/ spontaneous reactions
A
🔼G < 0
4
Q
Hess’ Law
A
The total enthalpy change for a reaction is independent of the route taken provided initial and final conditions are the same.
5
Q
Entropy Change
A
The sum of the entropies of products - the sum of the entropies of the reactant under standard conditions
6
Q
Free energy
A
🔼G = 🔼H - T🔼S
