What is specific latent heat of vaporization ?

In the previous question, if the specific latent heat of vaporization of water at 0^@C is eta times the specific latent heat of freezing of water at 0^@C , the fraction of water that will ultimately freeze is

The S.I. unit of specific latent heat of vapourization is ____

Find the internal pressure p_i of a liquid if its density rho and specific latent heat of vaporization q are known. The heat q is assumed to be equal to the work performed against the forces of the internal pressure, and the liquid obeys the Van der Waals equation. Calculate p_i in water.

An electric kettle is filled with 1.3 kg of water at 20^(@)C . The power of the heating coil of the kettle is 2.0 KW. After switching it on the water begins to boil in 220s . If the kettle was kept on for a further interval of Delta t it was observed that only 200g water remained in the kettle and remaining water vaporized (the vapor is allowed to escape through a small vent). The specific latent heat of vaporization of water at 100^(@)C (boiling point) is L = 2.26 KJ//g . Calculate the specific heat capacity of water and the interval Delta t . Assume that heat supplied by the heater is completely absorbed by the water.

Define specific latent heat of melting and specific latent heat of vaporization.