For benzene, C6H6, the heat of fusion is 9.9 kJ mol–1 at its melting point of 5 ºC, its heat of vapo — Thermochemistry Chemistry Question

For benzene, C₆H₆, the heat of fusion is 9.9 kJ mol–1 at its melting point of 5 ºC, its heat of vaporization is 30.8 kJ mol–1 at its normal boiling point of 80 ºC, and the molar heat capacity of the liquid is 135 J mol–1 K–1. To a system consisting of 1.00 mol pure solid C₆H₆ at 5 ºC is added 20.0 kJ of heat while maintaining the pressure at 1 atm. In what phases is the benzene found?