Changes in equilibrium

Question 1

Temperature
increase

Answer 1

Direction of the endothermic reaction
additonal heat will be partialy removed/absorbedd as the equilbrium is restored.
KC value changes

Question 2

Temperature
decreases

Answer 2

Direction of the exothermic reaction
additonal heat will be created/relased as the equilbrium is restored.
KC value changes

Question 3

Concentration
increase (reactants)

Answer 3

Direction of a forward reaction
Concentration of the reactants will be decreased as the equilibrium is re-established.
KC value does not change

Question 4

Concentration
increase (products)

Answer 4

Direction of a reverse reaction
Concentration of the product will be decreased as the equilibrium is re-established.
KC value does not change

Question 5

Pressure increase (or a small voulme)

Answer 5

Towrds the side with a fewer number of moles of gas.
Decreasing the total number of gas partciles in the system will reduce the imposed increase in pressure.
KC value does not change

Question 6

Pressure decrease (or a large voulme)

Answer 6

Towrds the side with a higher number of moles of gas.
Increasing the total number of gas partciles in the system will reduce the imposed decrease in pressure.
KC value does not change

Question 7

Cataylst

Answer 7

Both forward and reverse rates of reaction increase, but the position of the equilibrium remains the same.
Kc value does not change