Unit 2b: Reaction feasibility Flashcards
1
Q
Calculating standard enthalpy change
A
2
Q
Entropy ( S )
A
3
Q
2nd law of thermodynamics
A
Total entropy of a system and its surroundings always INCREASES for a spontaneous process
4
Q
Entropy and exo / endothermic reactions
A
Exo = increase in entropy
Endo = decrease in entropy
5
Q
3rd law of thermodynamics
A
The entropy of a perfect crystal at 0K is zero
6
Q
Change in entropy
A
7
Q
Change in free energy
A
8
Q
Free energy and feasibility
A
When delta G is negative a reaction is feasible
9
Q
Standard Free energy change
A
10
Q
Feasibility of reversible reactions
A
A reversible reaction will proceed spontaneously until the composition is reached where delta G = 0
