Recall that using the phase diagram for CO2 from Figure 10.34, we can determine:
It is important to know that Dry ice, CO2 does not melt at atmospheric pressure but will sublime at −78 °C.
Dry ice, CO2(s), does not melt at atmospheric pressure. It sublimes at a temperature of −78 °C. What is the lowest pressure at which CO2(s) will melt to give CO2(l)? At approximately what temperature will this occur? (See Figure 10.34 for the phase diagram.)
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