To determine the quantity of heat absorbed when a pure substance melts at its melting point, which pair of values must be multiplied?
a) the mass of the sample (in g) and its specific heat capacity
b) the amount of substance (in mol) and the molar enthalpy of fusion
c) the amount of substance (in mol) and the molar enthalpy of vaporization
d) the mass of the sample (in g) and the molar enthalpy of fusion