5.2.2- Enthalpy and Entropy Flashcards
1
Q
What is symbol of entropy?
A
S
2
Q
Define entropy
A
A measure of the dispersal of energy in a system which is greater when the system is more disordered
3
Q
Solid or gas, which is more disordered?
A
Gas
4
Q
What is the unit of standard entropy?
A
J K^-1 mol^-1
5
Q
How does temperature affect entropy?
A
The greater temperature particles have more energy and move more. Thus the arrangement of particles become more random. More random arrangement= higher entropy
6
Q
When a solid lattice is dissolved in solution what happens to entropy?
A
Entropy increases because the ions are more disordered
7
Q
How does change in number of gas molecules in a reaction affect entropy?
A
Increase in number of gas molecules = increase in entropy
Decrease in number of gas molecules = decrease in entropy
