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Latent heat of vaporization: “The amount of heat that is needed to convert a unit mass of liquid substance into a gaseous phase at constant temperature conditions is known as latent heat of vaporization.” An example of the process that involves latent heat of vaporization is the conversion of liquid particles into water vapors.
Jun 4, 2024 · The latent heat associated with melting a solid or freezing a liquid is called the heat of fusion; that associated with vaporizing a liquid or a solid or condensing a vapour is called the heat of vaporization. The latent heat is normally expressed as the amount of heat (in units of joules or calories) per mole or unit mass of the substance ...
Feb 2, 2011 · The latent heat of vaporization ΔH corresponds to the amount of energy that must be supplied to the system to convert a unit amount of substance from the liquid to the vapor phase under conditions of equilibrium between the two phases. This transition thus always occurs at constant temperature and the corresponding vapor pressure, p s.
The enthalpy of vaporization is a function of the pressure at which that transformation takes place. The heat of vaporization diminishes with increasing temperature and it vanishes completely at a certain point called the critical temperature (Critical temperature for water: 373.946 °C or 705.103 °F, Critical pressure: 220.6 bar = 22.06 MPa ...
Jan 30, 2023 · This process, called vaporization or evaporation, generates a vapor pressure above the liquid. The Heat of Vaporization (also called the Enthalpy of Vaporization) is the heat required to induce this phase change. Figure 1 1: Heat imparts energy into the system to overcome the intermolecular interactions that hold the liquid together to generate ...
The latent heat of evaporation for water is 2256 kJ/kg at atmospheric pressure and 100oC. The heat required to evaporate 10 kg can be calculated as. q = (2256 kJ/kg) (10 kg) = 22560 kJ. Latent heat of vaporization for fluids like alcohol, ether, nitrogen, water and more.
The system is constructed so that no vapor evaporates while ice warms to become liquid water, and so that, when vaporization occurs, the vapor remains in of the system. The long stretches of constant temperature values at 0º C 0º C and 100º C 100º C reflect the large latent heat of melting and vaporization, respectively.
