Question

When allowed to stand, nitrogen dioxide reaches dynamic equilibrium with dinitrogen tetroxide. according to the equation:
2 NO2(g) = N204(g) H = -57.20 kJ mol¯¹

What is the effect on the equilibrium position when:

a) the pressure is increased?

(b) the temperature is increased?

(c) a catalyst is added?​

Answer 1

Answer:

According to le chatelier's principle,

"If a reaction at equilibrium is subjected to change in parameters like temperature, pressure or concentration of reactants and products, then the reaction equilibrium shifts in a direction in which the change is counteracted upon."

a) If pressure is increased, it will tend to shift the equilibrium which will reduce the pressure, i.e. where the number of gaseous molecule is less. So, equilibrium will shift in forward direction.

b) It's an exothermic process. So, if temperature is  increased it will shift the equilibrium which will reduce the temperature. So, equilibrium will shift backward.

c)No effect -  Catalysts only increase the rate of forward and backward reaction, thereby decreasing the time of attainment of equilibrium. It does not affect the equilibrium position.