The molar heat of fusion of benzene is 9.92 kJ/mol. The molar heat of vaporization is 30.7 kJ/mol. a. Calculate the heat required to melt 7.03 g of benzene (C6H6) at its normal melting point. b. Calculate the heat required to vaporize that same sample of benzene at its normal boiling point. c. Why is the heat of vaporization more than three times the heat of fusion?