Entropy

Question 1

How does amount of disorder relate to entropy?

Answer 1

More disorder - positive entropy value
Less disorder (more ordered) - negative entropy value

Question 2

How to calculate entropy change.

Answer 2

ΣSproducts - ΣSreactants

Question 3

ENTROPY, S

Answer 3

A measure of the disorder of a system; a system becomes energetically more stable when it becomes more disordered

Question 4

Free Energy Change, ΔG

Answer 4

ΔG = ΔH – TΔS

Question 5

Feasibility of Reaction when ΔH is negative ΔS is positive

Answer 5

Always feasible

Question 6

Feasibility of Reaction when ΔH is positive ΔS is negative

Answer 6

Never feasible

Question 7

Feasibility of Reaction when ΔH is negative ΔS is negative

Answer 7

Reactions are only feasible at low temperatures

Question 8

Feasibility of Reaction when ΔH is positive ΔS is positive

Answer 8

Reactions are only feasible at high temperatures

Question 9

What would you expect to happen to the entropy when there are more gas moles of products than reactants?

Answer 9

Entropy increases because gas is much more disordered than either solid or liquid.

Question 10

When is a process able to take place spontaneously?

Answer 10

When ΔG