6.5

Question 1

In an endothermic reaction, what happens to the equilibrium, the K_c constant & the yield of products when temp decreases? (3)

Answer 1

(1) eqm = shifts left
(2) K_c = decreases
(3) yield of products = decreases

Question 2

In an endothermic reaction, what happens to the equilibrium, the K_c constant & the yield of products when temp increases? (3)

Answer 2

(1) eqm = shifts right
(2) K_c = increases
(3) yield of products = increases

Question 3

In an exothermic reaction, what happens to the equilibrium, the K_c constant & the yield of products when temp decreases? (3)

Answer 3

(1) eqm = shifts right
(2) K_c = increases
(3) yield of products = increases

Question 4

In an exothermic reaction, what happens to the equilibrium, the K_c constant & the yield of products when temp increases? (3)

Answer 4

(1) eqm = shifts left
(2) K_c = decreases
(3) yield of products = decreases

Question 5

If K_c is greater than 1, where is the position of the equilibrium? (1)

Answer 5

right

Question 6

If K_c is equal to 1, where is the position of the equilibrium? (1)

Answer 6

middle

Question 7

If K_c is less than 1, where is the position of the equilibrium? (1)

Answer 7

left

Question 8

In an endothermic reaction, K_c __________ when the concentration of the reactants is decreased. (1)

Answer 8

doesn’t change (because K_c is only affected by temp changes)

Question 9

If the conc. of a reactant is increased, explain how the equilibrium will shift. (2)

Answer 9

(1) shift to the right
(2) to counteract the inc. in conc. OR decrease the conc. of the reactant

Question 10

Do catalysts affect the position of the equilibrium? If not, what do they affect? (2)

Answer 10

(1) No
(2) the rate of the reaction OR they speed up reactions OR the speed up the rate at which equilibrium is reached

Question 11

What does the Haber Process produce? (1)

Answer 11

Ammonia

Question 12

What does the Contact Process produce? (1)

Answer 12

Sulfuric Acid

Question 13

The Haber Process requires high pressures, but it’s difficult to meet this condition. Give 2 reasons why. (2)

Answer 13

(1) requires expensive equipment to withstand it
(2) it incurs energy costs in compressing the gases

Question 14

In an exothermic reaction, K_c __________ when the concentration of the reactants is increased. (1)

Answer 14

doesn’t change (because K_c is only affected by temp changes)