Question

13.A student mixed 5.00 g (0.0594 mol) of solid cyclohexane, C6H12, (84.18 g mol–1) at its melting temperature of 6.6°C with 50.0 g (0.594 mol) of liquid cyclohexane at 50.0°C in an open yet insulated container. After thermal equilibrium was established, the temperature of the mixture was 44.5°C. The specific heat capacity of liquid cyclohexane is 1.809 J g–1K–1, and is assumed to be constant over the temperature interval.From this information, what is the molar enthalpy of fusion, ΔHfusion, of cyclohexane?

Answer 1

The molar enthalpy of fusion, ΔHfusion, of cyclohexane is 6.9 kJ/mol.