Question

What is the standard enthalpy change for the sublimation of iodine? Given that the standard enthalpy of fusion for iodine is 15.52 kJ/mol, and the standard enthalpy of vaporization for iodine is 41.57 kJ/mol.

Answer 1

The standard enthalpy change for the sublimation of iodine can be calculated by adding the standard enthalpy of fusion and the standard enthalpy of vaporization. This is because sublimation is the process of a solid directly converting into a gas, which involves both fusion  solid to liquid  and vaporization  liquid to gas .Standard enthalpy change for sublimation = Standard enthalpy of fusion + Standard enthalpy of vaporizationStandard enthalpy change for sublimation = 15.52 kJ/mol + 41.57 kJ/molStandard enthalpy change for sublimation = 57.09 kJ/molThe standard enthalpy change for the sublimation of iodine is 57.09 kJ/mol.