Question

The enthalpy of vaporization of water is 40.79 kJ/mol. How much heat is required to vaporize 2 moles of water at its boiling point?

• A. 40.79 kJ
• B. 81.58 kJ
• C. 20.39 kJ
• D. 10.39 kJ

Hint:

The enthalpy of vaporization represents the heat required to convert 1 mole of a liquid into vapor without changing temperature. Be sure to multiply by the number of moles for the total heat required.