Reversible Reactions

Question 1

what happens in reversible reactions

Answer 1

at the same time the forward and backward reactions are happening

Question 2

how can reversible reactions be changed

Answer 2

we can favour one over the other (e.g forward over backward to produce more forward)

Question 3

what is perfect
equilibrium

Answer 3

when forward and backward reactions in a ‘closed system’ occur at exactly the same rate

Question 4

we can change the equilibrium True or False

Answer 4

TRUE

Question 5

what is LeChateliers principle

Answer 5

a system at equilibrium will do the opposite to external changes placed upon it

Question 6

how can LeChateliers principle be applied to this

endothermic side A + B –>C + D exothermic side
<—
place the system in the fridge what happens

Answer 6

External temperature goes down
therefore equilibrium does opposite and produces more C+D

Question 7

what are the effects of pressure on equilibrium systems

where there is 3 moles of gas as reactants and 2 moles of gas product

Answer 7

increasing pressure means it will do opposite to limit amount made so more product is made because there is less moles there

decreasing pressure means the reactants will be made more because there is greater moles and it wants to do opposite

Question 8

if you increase the concentration of a reactant in equilibrium system what happens to equilibrium

Answer 8

shifts to favour the forward because it wants to make more products to go against external change

Question 9

if you increase the concentration of a product in eqM system what happens to equilibrium

Answer 9

favours the backward reaction to make more reactants - going against the external change

Question 10

why does a catalyst have no effect on equilibrium

Answer 10

it speeds up rate of reaction for both forward and backward reaction