Napthalene, C10H8, melts at 80.0C. If the vapor pressure of the liquid is 10 Torr at 85.8C and 40 Torr at 119.3C, and that of the solids is 1 Torr at 52.6C, calculate a) the AHvap Of the liquid, the Tb, and the ASvap at To b) the vapor pressure at the melting point assuming that the melting-point and triple-point temperature are the same, c) calculate AHsub of the solid and AHtus.