What is the heat of reaction if enthalpy of inputs and outputs at 25oC are 5 J and 8 J, the enthalpy of input and outputs at given temperature are 12 J and 15 J, enthalpy change of the reaction is 25 J?

Correct Answer: 25 J
Heat of reaction = (12 – 5) – (15 – 8) + 25 = 25 J.