The potential energy of the reactants in a three-step reaction is

CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics

Problem

150\,\text{kJ}

. The potential energy of the products is

90\,\text{kJ}

. Determine the overall enthalpy change,

\Delta H

, for the reaction and state whether the energy profile is consistent with an experimentally measured

\Delta H = -60\,\text{kJ}