The amount of heat required to change a liquid to gaseous state without any change in temperature is known as
[amp_mcq option1=”specific heat capacity” option2=”mechanical equivalent of heat” option3=”latent heat of vaporization” option4=”quenching” correct=”option3″]
This question was previously asked in
UPSC NDA-1 – 2017
The heat energy required to change the state of a substance from liquid to gas at a constant temperature (its boiling point) is called the latent heat of vaporization. This energy is used to overcome the intermolecular forces holding the substance in the liquid state during the phase change, rather than increasing the kinetic energy of molecules, which would increase temperature.
Latent heat is the heat absorbed or released during a phase transition (like melting, freezing, vaporization, condensation, sublimation) that occurs at a constant temperature. ‘Latent’ means hidden, as the heat transfer does not result in a temperature change during the process.