Question

compare the amount of heat required to vaporize 200 gram sample of h2o at its boiling point to the amount of heat required to melt 200 gram sample of h2o at its melting point

Answer 1

The enthalpy of vaporization of H2O is higher than the enthalpy of fusion of H2O, therefore vaporizing the same mass of H2O would require more heat/energy than melting the same mass of H2O.

hope it helps!