Equilibrium

Question 1

Le chatalliers principle

Answer 1

Equilibrium will shift to oppose any change imposed on it

Question 2

Effect of concentration on equilibrium

Answer 2

Concentration of reactants increases
- system shifts in favour of products to oppose change
Yield of products increases

Concentration of reactants decreases
- system shifts in favour of reactants to oppose the change
Yield of products decreases

Question 3

Effect of pressure on equilibrium

Answer 3

Pressure increases
- equilibrium shifts to side with fewer moles of gas

Pressure decreases
- equilibrium shifts to side with more moles of gas

Question 4

Effect of temperature on equilibrium

Answer 4

Temperature increases
- equilibrium shifts in endothermic direction

Temperature decreases
- equilibrium shifts in the endothermic direction

Question 5

Effect of catalyst on equilibrium

Answer 5

Catalyst has no effect on equilibrium
It increases the rate of forward and backward reactions equally

Question 6

Order 0

Answer 6

Concentration of A changes but rate stays the same

Question 7

Order 1

Answer 7

Rate is proportional to concentration of A

Question 8

Order 2

Answer 8

Rate is proportional to concentration of A^2

Question 9

Rate equation - [A] + [B] → [C] + [D]

Answer 9

K [A]^x [B]^x = rate

Where X= the order

Question 10

Arrhenius equation

Answer 10

K = Ae^ - Ea/ RT

K= rate constant
Ea = activation energy
T= temp in (K)
R= gas constant
A = Arrhenius constant

Question 11

Rearrange Arrhenius constant

Answer 11

LnK = LnA Ea/ RT

Ea/RT = LnA - LnK