Question

At 298 K, the enthalpy of fusion of a solid (X) is 2.8 kJ mol^–1 and the enthalpy of vaporisation of the liquid (X) is 98.2 kJ mol^–1 . The enthalpy of sublimation of the substance (X) in kJ mol^–1 is ....... . (in nearest integer)

Answer 1

Answer is : (101)

△H_sub = △H_fus + △H_vap

= 2.8 + 98.2 

= 101 kJ/mol