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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.
Latent heat is energy released or absorbed by a body or a thermodynamic system during a constant-temperature process. Two common forms of latent heat are latent heat of fusion ( melting) and latent heat of vaporization ( boiling ).
Latent Heat of Vaporization. Latent heat of vaporization is the heat consumed or discharged when matter disintegrates, changing state from fluid to gas state at a consistent temperature. The heat of vaporization of water is the highest known.
May 22, 2019 · In case of liquid to gas phase change, this amount of energy is known as the enthalpy of vaporization, (symbol ∆H vap; unit: J) also known as the (latent) heat of vaporization or heat of evaporation. Latent heat is the amount of heat added to or removed from a substance to produce a change in phase.
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 given quantity of the substance into a gas .
To solve part (b), we use the equation for heat required for vaporization, along with the latent heat of vaporization of water from the previous table.
Jul 11, 2021 · 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.
Latent heat of vapourisation: Liquid to gas...big space increase. The larger distance between the molecules means much larger potential energy. More energy is required, therefore, to turn the liquid into gas to provide that potential energy between the molecules. 2 comments.
Jan 1, 2014 · Latent heat of vaporization is a physical property of a substance. It is defined as the heat required to change one mole of liquid at its boiling point under standard atmospheric pressure. It is expressed as kg/mol or kJ/kg.
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.
