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Q. 11.22 Answer the following questions based on the P – T phase diagram of CO_{2} :

(a) CO_{2}  at 1 atm pressure and temperature -60^{\circ}C  is compressed isothermally. Does it go through a liquid phase?

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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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