Question

. The dimerization of NO2 is exothermic per the following chemical equation.

2NO2(g) N2O4(g) H= -57.1 kJ mol-1

Predict the following of each of the following perturbations to this reaction:

a) increase in temperature

b) addition of an inert gas

c) decrease in volume

d) addition of N2O4

Answer 1

This is exothermic, meaning it releases energy as it goes to forward reaction

so

a)

increasing T, will shift toward less production, since heat is being released, shift goes to NO2

b)

inert gas increases PRessure

Pressure favours least mol of gases, which is N2O4, therefore shift goes toward right, N2O4

c)

decrease in volume increases pressure, stated before:

Pressure favours least mol of gases, which is N2O4, therefore shift goes toward right, N2O4

d)

adding product will always shift toward more reactants (left)