quick fast revision chemical equilibrium

Question 1

what is a reversible reaction

Answer 1

when the products can react together to make the reactants

Question 2

what is dynamic equilibrium

Answer 2

rate of forward reaction is equal to rate of backward reaction in a closed system

Question 3

what is a closed system

Answer 3

when no exchange of matter can occur only energy can be transferred

Question 4

effect of increasing temperature in a dynamic equilibrium

Answer 4

a increase of temperature favours endothermic reaction

Question 5

effect of increasing pressure in a dynamic equilibrium

Answer 5

an increase in pressure favours the side with the least moles (molecules)

Question 6

effect of concentration in a dynamic equilibrium

Answer 6

an increase in concentration of reactants

move the equilibrium forwards direction

to make more products

Question 7

explain in terms of bond making and breaking why a reaction is endothermic

Answer 7

energy needed to break the bonds

is more than

energy released in bond formation

Question 8

explain in terms of bond making and breaking why a reaction is exothermic

Answer 8

energy needed to the break the bonds

is less than

energy released in bond formation