chemical equilibria 3.1.6 in all papers

Question 1

when is dynamic equilibirum achieved?

Answer 1

rate of forward reaction = rate of backwards reaction

Question 2

what happens when pressure is increased?

Answer 2

• system reacts to decrease pressurre
• equilibrium moves in the direction of less particles

Question 3

what happens when pressure decreases?

Answer 3

• system reacts to increase pressurre
• equilibrium shifts to side with more molecules

Question 4

what happens if the amount of molecules are equal on both sides and conditions change?

Answer 4

no effect

Question 5

what happens if tempreture increases?

Answer 5

• system will try to decrease it
• favours endothermic side and shift to that side

Question 6

what happens if tempreture decreases?

Answer 6

• system will try to increase tempreture
• system will favour exothermic reaction and shift to that side

Question 7

whats the effect of adding a catalyst on the position of equlibrium?

Answer 7

no effect

Question 8

what does it mean if the Kc value is greater than 1?

Answer 8

products exceed reactants, reaction almost goes to completion

Question 9

what does it mean if the Kc value is less than 1?

Answer 9

reactants exceed products, when its close to 0 the reaction hardly occurs

Question 10

what factors affect Kc value?

Answer 10

ONLY tempreture
- in an endothermic reaction, kc increases as tempreture increases
- in an exothermic reaction kc decreases as tempreture increases