Chemistry

Problem

An energy diagram (values expressed in kcal mol⁻¹) gives: reactants at 12 kcal mol⁻¹ and products at –3 kcal mol⁻¹. Using 1 cal = 4.184 J, calculate the overall ΔH of the reaction in kJ mol⁻¹ (answer to the nearest kilojoule).

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