Question

The boiling point of water is 1000C.

(a) Once boiling starts, why does the temperature not rise accordingly even heat is supplied? (b) Steam causes more severe burns than boiled water at the same temperature. Why?.

Answer 1

a) The heat which we supply to water during boiling is used to overcome these forces of attraction between the particles so that they become totally free and change into a gas. This latent heat does not increase the kinetic energy of water particles and hence no rise in temperature takes place during the boiling of water.

b) Steam produces more severe burns than boiling water even though both are at 100oC because steam contains more heat, in the form of latent heat, than boiling water.

Explanation:

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