What is the Heat of Reaction Calculator?

The Heat of Reaction Calculator helps students and chemistry learners determine the overall enthalpy change (ΔH) for a chemical reaction. By using the sum of enthalpies of products and reactants, the calculator quickly computes whether the reaction absorbs or releases heat. This makes it easier to study reaction energetics, predict energy flow, and analyze thermochemistry experiments.

How to Use:

1. Enter Sum of Enthalpy of Products: Type the total enthalpy of all products in kJ/mol.
2. Enter Sum of Enthalpy of Reactants: Type the total enthalpy of all reactants in kJ/mol.
3. Click “Calculate”: The calculator subtracts reactant enthalpy from product enthalpy to find ΔH.
4. Review Result: The output shows the heat of reaction in kJ/mol, indicating whether the reaction is endothermic (ΔH > 0) or exothermic (ΔH < 0).