The amount of heat involved in the evaporation or condensation of 1 g of the substance.
Heat of vaporization is energy absorbed during the change of a mole of liquid to a vapor without a change in temperature.
the heat energy needed to change 1 gram of a substance from liquid to gas. (see heat of condensation)
the heat that must be added per unit mass for a phase change of a substance between liquid and gas states. For a change from liquid to solid, the heat of vaporization is released.
the energy required to change a unit mass of a substance from a liquid to a gas (or the energy given up when a unit mass changes from a gas to a liquid)
The heat that must be absorbed to boil a mole of a liquid.
is the heat required to convert a substance from the liquid to the gaseous state with no temperature change (also called latent heat of vaporization).
The amount of heat needed to change a unit volume from a liquid to a vapor at a given pressure without a temperature change.
Heat which must be put into a liquid to vaporise it at its boiling point.
The amount of heat energy required to convert water from a liquid to a gas.
The heat required to vaporize a unit mass of a substance (e.g., water). For water = 600 calories/gram.
heat absorbed by a unit mass of a material at its boiling point in order to convert the material into a gas at the same temperature
The amount of heat necessary to convert a liquid (water) into vapor.
The amount of heat required to vaporize one gram of a liquid at its boiling point with no change in temperature. Usually expressed in J/g. The molar heat of vaporization is the amount of heat required to vaporize one mole of liquid at its boiling point with no change in temperature and usually expressed ion kJ/mol.
Latent heat involved in the change between liquid and vapor states.
The amount of additional (latent) heat needed to change a given amount of liquid existing at its boiling point temperature into a vapor.
Heat needed to turn a liquid into a gas.
(Or latent heat of vaporization.) See latent heat.