Thermodymanics

Question 1

State the second law of thermodynamics dynamics?

Answer 1

The entropy of a reaction system and its surroundings, increases for a spontaneous process

Question 2

State 3rd law of thermodynamics

Answer 2

The entropy of a perfect crystal is at 0K (zero)

Question 3

entropy increases when

Answer 3

Increase in temperature
When a substance melts, boils or dissolves

Question 4

Type of entropy in a solid

Answer 4

Low

Question 5

Type of entropy in a gas

Answer 5

High

Question 6

When heat energy is produced, what happens to the entropy of the surroundings

Answer 6

Increases

Question 7

What happens to the entropy of the surroundings when heat energy is absorbed?

Answer 7

Decreases

Question 8

What does ΔG mean

Answer 8

Change in free energy

Question 9

What does ΔS mean

Answer 9

Change in entropy

Question 10

What does ΔH mean

Answer 10

Change in enthalpy

Question 11

In Gibbs free energy, what makes the reaction feasible?

Answer 11

If the free energy between reactants and products is negative

Question 12

What happens to the equilibrium position if ΔG°<0

Answer 12

The forward reaction is favoured

Question 13

What happens to the equilibrium position if ΔG°>0

Answer 13

The reverse reaction is favoured

Question 14

How do we know if a reaction is at equilibrium

Answer 14

ΔG°=0