CH3.8 Equilibrium consants

Question 1

dynamic equilibrium

Answer 1

Is a reversible reaction where the rates of the forward and reverse reactions are equal, so the quantities of each substnace stay the same

Question 2

Le chantelier’s principle states ..

Answer 2

That in a system at dynamic equilibrium experiences a chang in its conditions thent the equilibrium will shift to try to minimise the chagne

Question 3

Kc

Answer 3

The equilibrium constant in term of concentration and is usually used for reactions in solution although it can be used for any reaction

Question 4

kp

Answer 4

Is the equilibrium constant in terms of parital gas pressures and is used for reaction only involving gases

Question 5

Kc equation

Answer 5

Kc = (X)^x(Y)^y/(A)^a(B)^b

where aA + bB xX + yY

Question 6

Kp equation for equation aA + bB xX + yY

Answer 6

kP =pX^x pY^y / pA^a pB^b

Question 7

what if Kc is less than 1

Answer 7

very few products are force and most of the mixture is starting materials. This is typically the case when change in Gibbs for the reacttion is positive as the reaction will not occur spontaneously.

Question 8

If Kc is more than 1

Answer 8

then most of the reactants have been converted into products. This is typically the case when change in Gibbs for the reaction is negative as the reaction iwll occur spontaneously

Question 9

what is the only thing that will effect Kc and Kp

Answer 9

temperature

Question 10

exothermic reaction Kc Kp

Answer 10

increasing temperature decreases Kc and Kp

Question 11

endothermic reaction

Answer 11

increasing temperature increases Kc and Kp

Question 12

an equimolar mixture

Answer 12

is one that has equal amounts of moles ( and hence equal concentration) of each susbtance

Question 13

partial pressure

Answer 13

the pressure f a particular gas in a mixture