The normal melting and boiling points of O2 are —218 °C and —183 °C respectively. Its triple point is at —219 °C and 1.14 torr, and its critical point is at —119 °C and 49.8 atm. (a) Sketch the phase diagram for O2, showing the four points given and indicating the area in which each phase is stable. (b) Will O2 (s) float on 02(1)? Explain. (c) As it is heated, will solid O2 sublime or melt under a pressure of 1 atm?
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