3.4 Equilibria

Question 1

What is dynamic equilibria?

Answer 1

in reversible reactions when the rates of forward and reverse reactions are equal

Question 2

When can dynamic equilibria be achieved?

Answer 2

in a closed system

Question 3

describe the products and reactants at equilibria

Answer 3

• concentration of products and reactants remain constant

- they are rarely equal

Question 4

What do chemists do to maximise profits?

Answer 4

-employ strategies to move to position of equilibrium in favour of the products

Question 5

What may effect the position of equilibria?

Answer 5

• altering temperature
• altering pressure
• adding/removing reactants/products

Question 6

What is the effect of increasing temperature on equilibria?

Answer 6

-favours endothermic reaction

Question 7

What is the effect of decreasing temperature on equilibria?

Answer 7

-favours exothermic

Question 8

What is the effect of increasing pressure on equilibria?

Answer 8

-favours the side with lower number of moles of gas

Question 9

What is the effect of decreasing pressure on equilibria?

Answer 9

-favours the side with higher number of moles of gas

Question 10

What is the effect of adding a reactant or removing a product on equilibria?

Answer 10

-lie right

Question 11

What is the effect of adding a product or removing a reactant on equilibria?

Answer 11

-lie left

Question 12

What is the effect of the addition of a catalyst on equilibria?

Answer 12

• increases the rates of the forward and reverse reactions equally
• increased the rate at which equilibria is achieved
• no effect on position of equilibria