A new substance developed in a laboratory has the following properties: normal melting point, 83.7°C; normal boiling point, 177 °C; triple point, 200. Torr and 38.6 °C.

(a) Sketch the approximate phase diagram and label the solid, liquid, and gaseous phases and the solid–liquid, liquid–gas, and solid–gas phase boundaries.

(b) Sketch an approximate heating curve for a sample at constant pressure, beginning at 500. Torr and 25°C and ending at 200°C.