Heat of Vaporization Calculator Formula
Understand the math behind the heat of vaporization calculator. Each variable explained with a worked example.
Formulas Used
Heat Energy Required
heat = mass * latent_heat_vHeat Energy (kJ)
heat_kj = mass * latent_heat_v / 1000Variables
| Variable | Description | Default |
|---|---|---|
mass | Mass(kg) | 1 |
latent_heat_v | Latent Heat of Vaporization(J/kg) | 2260000 |
How It Works
Heat of Vaporization
The heat of vaporization is the energy needed to convert a liquid to gas at constant temperature.
Formula
Q = m * L_v
For water, L_v = 2,260,000 J/kg = 2260 kJ/kg, much larger than the heat of fusion because more energy is needed to fully separate molecules.
Worked Example
Boiling 1 kg of water at 100°C.
mass = 1latent_heat_v = 2260000
- 01Q = m * Lv
- 02Q = 1 * 2260000
- 03Q = 2,260,000 J = 2260 kJ
Ready to run the numbers?
Open Heat of Vaporization Calculator