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Online calculator, figures and tables showing heat of vaporization of water, at temperatures from 0 - 370 °C (32 - 700 °F) - SI and Imperial units. The (latent) heat of vaporization (∆H vap ) also known as the enthalpy of vaporization or evaporation, is the amount of energy (enthalpy) that must be added to a liquid substance, to transform a ...
- Seawater
Figures and tables showing the enthalpy and entropy of...
- Compressed Water
Online calculator, figures and tables showing heat of...
- Supercooled Water
Online calculator, figures and tables showing heat of...
- Boiling Points at High Pressure
Thermodynamic properties of heavy water (D2O) like density,...
- Thermodynamics
Water - Heat of Vaporization vs. Temperature Online...
- Properties at Gas-Liquid Equilibrium Conditions
Thermal properties of water at different temperatures like...
- Saturation Pressure
Vapor pressures vs. dry and wet bulb temperatures in moist...
- Boiling Points at Vacuum Pressure
Moist Air - Water Vapor and Saturation Pressure Saturation...
- Seawater
The latent heat of vaporization is the amount of heat needed to cause a phase change between liquid and gas. L f L f and L v L v are coefficients that vary from substance to substance, depending on the strength of intermolecular forces, and both have standard units of J/kg.
In thermodynamics, the enthalpy of vaporization (symbol ∆H vap), also known as the (latent) heat of vaporization or heat of evaporation, is the amount of energy that must be added to a liquid substance to transform a quantity of that substance into a gas.
The heat Q required to change the phase of a sample of mass m is given by \ (\mathrm {Q=mL_f}\) (melting or freezing) and \ (\mathrm {Q=mL_v}\) (evaporating or condensing), where \ (\mathrm {L_f}\) and \ (\mathrm {L_v}\) are the latent heat of fusion and the latent heat of vaporization, respectively.
Thermal properties of water at different temperatures like density, freezing temperature, boiling temperature, latent heat of melting, latent heat of evaporation, critical temperature and more. Thermodynamic properties of water: Boiling temperature (at 101.325 kPa): 99.974 °C = 211.953 °F.
The heat \(Q\) required to change the phase of a sample of mass \(m\) is given by \[ Q = mL_f (melting/freezing),\] \[Q = mL_v (vaporization/condensation),\] where the latent heat of fusion, \(L_f\), and latent heat of vaporization, \(L_v\), are material constants that are determined experimentally.
Existing formulae and approximations for the latent heat of vaporization of water, L v, are reviewed. Using an analytical approximation to the saturated vapour pressure as a function of temperature, a new, temperature-dependent function for L v is derived.
