CHEMISTRY · Single correct · AP · Chemistry · Thermochemistry · Thermochemistry
Problem
In a hypothetical reaction, the potential energy of the reactants is 35 kJ mol⁻¹ and that of the products is 15 kJ mol⁻¹. Which statement best describes the forward reaction?
(a) It is exothermic because ΔH=+20kJ mol−1.
(b) It is exothermic because ΔH=−50kJ mol−1.
(c) It is exothermic because ΔH=−20kJ mol−1.
(d) It is endothermic because ΔH=−20kJ mol−1.