1. (We dismissed how one might (Io this problem in class.) A simple substance of molecular weight a has its triple point at the absolute temperature Tu and pressure pa. At this point the densities of the solid and liquid are p; and pg, reapectively, while the vapor can he approximated by a dilute ideal gas. If at this triple point the slope of the melting curve is {dry/)", and that of the liquid vaporization curve is {dpf'th)m explain how you oould calculate the slope [zip/IF)\" of the sublimation curve of the solid