Calculating heat absorbed or released when any gas / liquid transformation takes place.
I'm not an engineer, but I would imagine these calculations are performed in designing steam plants to make electricity. Water must be boiled, the steam runs thru a steam turbine, then it is condensed into water and is recycled ... boiledto steam ... thru turbine ... condensed etc.
The latent heat of evaporation
The latent heat of vaporization of water is 2260 joules per kilogram.
The latent heat of vaporization is what is commonly referred to as boiling. This is the amount of energy require to change from a state of liquid to vapor.
The energy required to boil a substance
Some common appliances that make use of latent heat of vaporization include air conditioners, refrigerators, and dehumidifiers. These appliances utilize refrigerants that undergo a phase change from liquid to gas, absorbing heat from the surroundings in the process.
Vaporization is the change of liquid water to water vapor. Vaporization requires addition of the latent heat of vaporization to liquid water. The latent heat of vaporization supplies the liquid water molecules with enough energy to become vapor molecules. The latent heat of vaporization at 1.0 atmosphere pressure is about 1000 Btu per lbm ( 2260 kJ per kg ).
Perspiration coats the outside of the skin with moisture (water). The water evaporates. Evaporation requires heat to be absorbed by the water (the latent heat of vaporization). Heat is removed from the body surface to provide the water with the latent heat of vaporization.
Because the latent heat of fusion and latent heat of vaporization are very high
The latent heat of vaporisation of water requires more energy. This is because on melting, the intermolecular bonds in water are only weakened whereas on boiling, the bonds are completely broken, which requires a larger amount of energy.
L can either mean the latent heat of vaporization or condensation. The latent heat of vaporization is the energy required to completely turn 1 kilogram of a liquid into a gas at its boiling point. The latent heat of condensation is the energy required to completely turn 1 kilogram of a solid into a liquid at its melting point.
Latent Heat of Evaporation, or Evaporation Enthalpy. It is given in units of energy over unit of mass, i.e., KJ/Kg.
The Latin heat of vaporization, also known as the latent heat of vaporization, refers to the amount of energy required to convert a unit mass of a substance from a liquid to a vapor without a change in temperature. This energy is necessary to overcome intermolecular forces during the phase transition. The specific value varies depending on the substance, with water having a high latent heat of vaporization due to its strong hydrogen bonding.