How much energy is released when 32.0 g of molten lead solidifies?

Question

The chart shows enthalpy fusion kJ/kg for lead is 24.5 and enthalpy of vaporization for lead is 871

Answer 1

For solidifying from liquid state to solid state, one uses the ∆H_fusion, which is 24.5 J/g.

32.0 g Pb x 24.5 J/g = 784 J of energy released