Define the following terms :
(a) Enthalpy of fusion
Enthalpy of atomization

Explanation

(a) Enthaply of fusion : The enthalpy change or amount of heat absorbed that accompanies the fusion of one mole of a solid at constant temperature and pressure is called enthalpy of fusion. If is denoted by
`(Delta_("fus")H)`.
(b) Refer to HSC Paper, March 2018, Answer 4. (i) (b).