# Q. 11.22 Answer the following questions based on the P – T phase diagram of $\inline CO_{2}$ :(a) $\inline CO_{2}$  at 1 atm pressure and temperature $\inline -60^{\circ}C$  is compressed isothermally. Does it go through a liquid phase?

Answers (1)

The temperature -60 oC lies to the left of the triple point of water i.e. in the region of solid and vapour phases. Once we start compressing CO2 at this temperature starting from 1 atm pressure it will directly convert into solid without going through the liquid phase.

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