The amount of heat required to change a liquid to gaseous state without any change in temperature is known as

The amount of heat required to change a substance from a liquid state to a gaseous state without any change in temperature is defined as the latent heat of vaporization [1]. During this phase change, the temperature remains constant because the energy supplied is used to overcome intermolecular attractive forces and break molecular bonds rather than increasing the kinetic energy of the particles [1]. This 'hidden' heat is absorbed when a liquid vaporizes and released when a gas condenses back into a liquid [4]. In contrast, specific heat capacity refers to the heat required to raise the temperature of a unit mass by one degree. The mechanical equivalent of heat describes the relationship between work and heat energy, while quenching is a rapid cooling heat treatment process used in metallurgy.

Sources

1. [1] https://www.sciencedirect.com/topics/earth-and-planetary-sciences/heat-of-vaporization
2. [4] https://en.wikipedia.org/wiki/Specific_heat_capacity