19.3 Controlling Position Of Equilibrium

Question 1

What happens to position of equilibrium if concentration is increased?

Answer 1

Equilibrium position moves away from the substance

Question 2

What happens to position of equilibrium if pressure is increased?

Answer 2

Equilibrium position shifts towards the side with fewer moles

Question 3

What happens to position of equilibrium if temperature is increased?

Answer 3

Equilibrium shifts in the direction of the endothermic reaction

Question 4

What does K value of 1 mean?

Answer 4

Equilibrium is halfway between reactants and products

Question 5

K greater than 1

Answer 5

Shows equilibrium in favour of products

Question 6

K value of less than 1

Answer 6

Equilibrium position towards the reactants

Question 7

What happens to K at a set temperature?

Answer 7

K does not change, even if concentration or pressure changes, and if there is a catalyst present

Question 8

Only condition that causes K to change

Answer 8

Temperature change

Question 9

K value when temperature is changed for exothermic reactions

Answer 9

Temperature increase - K decreases
Temperature decrease - K increases

Question 10

When forward reaction is exothermic and temperature is increased, what happens to Kp?

Answer 10

If temperature increases, Kp also increases
Pressure has to change, so pressure of reactants decrease, and pressure of products increase
Therefore, yield will increase

Question 11

A + B >< C
If concentration of A is doubled, what happens?

Answer 11

Kp stays constant
Pressures of A and B must decrease and pressure of C must increase
Product formed has increased and so has the yield