A.How much heat must be supplied to 41 g of ice at -28C to convert it to steam at 154C? (Specific heats: ice = 2.0 J/gC; water = 4.2 J/gC; steam = 2.0 J/gC. Molar heat of fusion of water at 273 K = 6.01 kJ/mol. Molar heat of vaporization of water at 373 K = 40.7 kJ/mol.)

B.Mercury has the following physical properties: normal melting point = -39C, normal boiling point = 357C, heat of fusion = 2.33 kJ/mol, heat of vaporization = 284 J/g, specific heat = 0.139 J/gC. Calculate H for the conversion of 159 g of solid mercury at its freezing point to mercury vapor at its boiling point.