🔥 What is Heat of Combustion?

The heat of combustion is the amount of energy released when a substance undergoes complete combustion with oxygen under standard conditions. It's usually measured in kJ.

⚙️ How to Use This Calculator

• Enter the mass of the substance in grams.
• Enter the enthalpy change (ΔH) in kJ/mol (usually a negative value).
• Enter the molar mass of the substance in g/mol.
• The calculator will instantly compute the heat of combustion.

📘 Formula Used

Heat of combustion (kJ) = (Mass / Molar mass) × ΔH

🧪 Example

If 50 g of ethanol (C₂H₅OH, Molar mass = 46.07 g/mol) burns and the ΔH is -1367 kJ/mol:
Heat of combustion = (50 / 46.07) × (-1367) = -1483.9 kJ