In a reaction coordinate diagram

CHEMISTRY · Subjective · A Level · Chemistry · Thermodynamics · Thermodynamics

Problem

In a reaction coordinate diagram, the reactants are at

50\,\text{kJ mol}^{-1}

, the transition state is at

190\,\text{kJ mol}^{-1}

, and the products are at

-20\,\text{kJ mol}^{-1}

(all energies referenced to the same zero). Determine the numerical values of (i) the activation energy

E_a

and (ii) the standard Gibbs free-energy change

\Delta G^\circ

for this reaction.