Consider the phase diagram of CO₂ in Figure 12.28.
(a) Is the density of liquid CO₂ greater or less than that of solid CO₂?
(b) In what phase do you find CO₂ at 5 atm and 0°C?
(c) Can CO₂ be liquefied at 45°C?

Data given in Figure 12.28

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Pressure (atm) 16 14 12 10 8 A 2 0 -100 P₁ = 73 atm Solid 5.10 atm -60 Critical point- Liquid Triple point -56.6°C Gas -20 0 +20 Temperature (°C) "Supercritical fluid" Tc = +31°C +60