Nitrogen undergoes reaction with oxygen in an equilibrium reaction. $\text{N}_2(g) + \text{O}_2(g) \rightleftharpoons 2\text{NO}(g) \quad \Delta H = +170\,\text{kJ mol}^{-1}$ At equilibrium for this reaction, which statement is correct?
- AThe concentration of nitrogen present will change with time.
- BThe forward and backward reactions are taking place at the same rate.
- CThe forward reaction releases heat energy.
- DThere are more molecules on the left hand side of the equation than on the right.