Statement I: Heat of sublimation is the sum of heat of fusion and heat of vaporisation.Statement II : Heat of the reaction or enthalpy change is same whether reaction takes place in one step or in multiple steps.

The process of direct conversion of solid into gas is known as Sublimation.It involves two stepsSolidliquidgasAccording to Hess law total energy change of a reaction remains sameWhether the reaction involves single step or many steps