Question

what is meant by saying that the latent heat of vaporization of water is 22.5 into 10 to power 5 joule per kg

Answer 1

The term "latent" is used when we refer to a phase-changing process. Vaporization refers to the phase change from liquid to gas.
Hence, latent heat of vaporization of water refers to the amount of heat energy needed to convert one kilogram of water from liquid phase to vapour.

Note: No temperature change takes place although the latent heat of energy is used. This energy increases the internal energy of the system and converts it from liquid to gas.

Hence, the statement implies water is taking $22.5 * 10^5 J/kg$ of heat energy to convert water from liquid to its gaseous (vapour) state.

[ANSWERED]

Answer 2

Explanation:

it means that 22.5 X 10 2 power 5 joule heat is required to change 1 kg of water at its boiling point hundred degree Celsius into a stream or evaporation