Question

When NaNO₃ is heated in a closed vessel, O₂ is liberated and NaNO₂ is left behind. At equilibrium, ______.

Options

• addition of NaNO₃ favours forward reaction

• addition of NaNO₂ favours reverse reaction

• increasing temperature favours forward reaction

• all of these

Answer 1

When NaNO₃ is heated in a closed vessel, O₂ is liberated and NaNO₂ is left behind. At equilibrium, increasing temperature favours forward reaction.

Explanation:

The process is endothermic, therefore a rise in temperature encourages it to proceed. The heterogeneous equilibrium is unaffected by the addition of solids since their concentrations are constant.