6 Chem Energetics (II) Flashcards
1
Q
Entropy (S)
A
- Measure of disorder in a system
- How probable the state of the system is
2
Q
Factors increasing entropy
A
- Increase in temperature
- Change in phase
- Change in number of particles
- Change in gas expansion
- Mixing of particles
3
Q
Gibbs Equation
A
ΔG = ΔH - TΔS
4
Q
Spontaneity of reaction
A
ΔG < 0, spontaneous
ΔG = 0, equilibrium
ΔG > 0, not spontaneous
5
Q
ΔH and ΔS both positive
A
Spontaneous at high temperatures
6
Q
ΔH and ΔS both negative
A
Spontaneous at low temperatures
7
Q
ΔH negative, ΔS positive
A
Spontaneous at all temperatures
8
Q
ΔH positive, ΔS negative
A
Not spontaneous at all temperatures
