Entropy

Question 1

What does entropy tell you?

Answer 1

How much disorder there is

Question 2

What is entropy a measure of?

Answer 2

The number of ways that particles can be arranged and the number of ways that the energy can be shared out between the particles

Question 3

Why do particles move?

Answer 3

They like disorder

They try to increase the entropy

Question 4

What three things affect entropy?

Answer 4

Physical state
Dissolution
Number of particles

Question 5

How does physical state affect entropy?

Answer 5

Hardly any entropy in solids as they vibrate at a fixed point
Gasses have the highest entropy as they can move wherever

Question 6

How does dissolution affect entropy?

Answer 6

Dissolving a solid also increases it’s entropy as dissolved particles can move freely as they’re no longer held in one place

Question 7

How does the number of particles affect entropy?

Answer 7

If there are more particles, there are more ways the particles and their energy can be arranged

Question 8

What equation is used to calculate the entropy change?

Answer 8

ΔS = S (products) - S (reactants)

Question 9

What is the symbol for entropy?

Answer 9

S

Question 10

What are the units for ΔS?

Answer 10

J K-1 mol-1