5.2.2 Entropy Flashcards
1
Q
What does high entropy indicate?
A
The greater the entropy, the greater the dispersal/disorder
2
Q
Entropy vs enthalpy
A
Enthalpy released = -ve delta H
Entropy released = +ve delta S
3
Q
What value indicates a feasible reaction?
A
Negative S value is a feasible reaction
4
Q
Total entropy = ?
A
Total = system + surroundings
5
Q
Enthalpy of system = ?
A
System = entropy products minus entropy reactants
Use molar quantities
6
Q
Enthalpy of surroundings = ?
A
Surroundings = -ve delta H divided by T
kJ to J = x1000
J to kJ = /1000
7
Q
Free energy (delta G) = ?
A
Delta G = delta H minus T times entropy of system
🔼G=🔼H-T🔼S system
kJmol-1
8
Q
🔼G < 0 = ?
A
Feasible reaction
9
Q
If G=0 and reaction is in equilibrium then rearrange:
A
🔼H=T🔼S
Or
🔼H divided by 🔼S = T
