Question

What is the standard enthalpy change for the phase transition of water from its liquid to gaseous state at its boiling point of 100°C and 1 atm pressure? Given that the standard enthalpy of vaporization of water is 40.7 kJ/mol.

Answer 1

The standard enthalpy change for the phase transition of water from its liquid to gaseous state at its boiling point of 100C and 1 atm pressure is equal to the standard enthalpy of vaporization of water. Given that the standard enthalpy of vaporization of water is 40.7 kJ/mol, the standard enthalpy change for the phase transition is:H = 40.7 kJ/mol