Energy Released By Fuels Calculator
When fuels burn, energy is released due to new chemical bonds being formed. Burning fuels is an example of an exothermic reaction
The amount of energy released by burning a fuel can be calculated using the formula q = (m_water * c_water * ΔT) / m_fuel
q = Eneregy Released (Joules)
m_water = Mass of water (kg)
c_water = Specific heat capacity of water (
J/g)
ΔT = Change in temperature of the water (°C)
m_fuel = Mass of fuel burned
This calculator supports:
Mass Units: kg
Temperature Units: °C
Energy Units: J, kJ
Example Calculation
You want to determine the amount of energy released by burning a unknown fuel.
You set up equipment to allow the fuel to be burned under the water so the energy will be absorbed by it
The temperature of the water before is 20°C. After burning the fuel, the water is 55°C. The mass of water is 0.3kg. The mass of the fuel is 0.5kg
1. Formula
q = (m_water * c_water * ΔT) / m_fuel
2. Insert the values
q = (0.3kg * 4180J/kg * 35°C)/0.5kg
3. Resulting Energy Release
q = 87,780J
FAQ
//Update
Can I use this calculator for liquids and solids?
Yes. The formula used by our calculator applies to both liquids and solids.
Can I use this calculator for gases?
Yes but gas density depends on temperature and pressure. This calculator assumes values measured at standard conditions
What’s the difference between g/cm³ and kg/m³?
1 g/cm³ = 1000 kg/m³.
What are densities of common materials?
Water: ~1 g/cm³ (1000 kg/m³)
Air: ~0.0012 g/cm³ (1.2 kg/m³)
Gold: ~19.3 g/cm³ (19,300 kg/m³)
Steel: ~7.8 g/cm³ (7800 kg/m³)