(a) Sketch the phase diagram for O2, showing the four points given above and indicating the area in which each phase is stable.
Try sketching the phase diagram yourself; check your result here
(b) Will O2(s) float on O2(l)? Explain.
From the phase diagram in part (a), the solid-liquid line is normal (slopes to the right). Thus, O2(s) is more dense than O2(l), and as a result will not float.
(c)As it is heated, will solid O2 sublime or melt under a pressure of 1 atm?
If the solid is at constant pressure of 1 atm (760 torr), it will melt when heated.
Doug Chapman firstname.lastname@example.org 7/1/08