Question

When a solid melts, the temperature of the system does not change after the melting point is reached even when we continue to supply heat? Give reason. Define latent heat of vapourisation. Which will cause more severe burns boiling water or steam and why?

Answer 1

In solids this is because the eneargy lroduced by heat is used in breaking the dtrong intermolecular forces of attraction between their particles...hence the temperature does not change.
Latent heat of vapourisation is the heat eneargy required to change one kg of liquis into gas at atmostpheruc pressure at its boiling point is called latent heat of vapourisation.
Steam will give more severe burns as compared to boiling water.

Answer 2

When a solid melts the temperature of the system does not change after the melting point is reached even when we continue to supply heat because the heat is absorbed by the system to break the bonds
Heat required to change one mole of a liquid at its boiling point under standard atmospheric pressure
Steam will cause more severe burns than water due to its latent heat of vaporization