A certain reaction has a forward activation energy of 50 kJ and an overall energy…

CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics

Problem

A certain reaction has a forward activation energy of 50 kJ and an overall energy change of −20 kJ. Which statement best describes the relative positions of the reactants and products on a correctly drawn reaction energy profile? (a) The products lie 70 kJ below the reactants on the energy axis.\text{The products lie }70\text{ kJ below the reactants on the energy axis.} (b) The products lie 20 kJ above the reactants on the energy axis.\text{The products lie }20\text{ kJ above the reactants on the energy axis.} (c) The products lie 20 kJ below the reactants on the energy axis.\text{The products lie }20\text{ kJ below the reactants on the energy axis.} (d) The products lie 50 kJ below the reactants on the energy axis.\text{The products lie }50\text{ kJ below the reactants on the energy axis.}

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