Question

Calculate the standard enthalpy change for the sublimation of iodine (I2) if 1 mole of I2(s) is converted to 1 mole of I2(g) at 25°C and 1 bar pressure. Given the following information:- The standard enthalpy of fusion of I2 is 15.4 kJ/mol- The standard enthalpy of vaporization of I2 is 41.3 kJ/mol- The standard entropy change for the sublimation of I2 is 62.4 J/mol K.

Answer 1

To calculate the standard enthalpy change for the sublimation of iodine, we can use the following equation:H_sublimation = H_fusion + H_vaporizationGiven the standard enthalpy of fusion  H_fusion  is 15.4 kJ/mol and the standard enthalpy of vaporization  H_vaporization  is 41.3 kJ/mol, we can plug these values into the equation:H_sublimation = 15.4 kJ/mol + 41.3 kJ/molH_sublimation = 56.7 kJ/molTherefore, the standard enthalpy change for the sublimation of iodine  I2  is 56.7 kJ/mol.