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Answer the following questions based on the P -T phase diagram of carbon dioxide : (d) Is CO_2 solid liquid or gas at (a) -70 degree C under 1 atm,

Q .11.21 Answer the following questions based on the P-T phase diagram of carbon dioxide: 

(d) Is CO_{2}  solid, liquid or gas at

(a) -70^{\circ}C under 1\; atm,

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CO2 is vapour at -70 oC under 1 atm pressure as the point corresponding to this condition lies in vapour region in the given P-T phase diagram of carbon dioxide.

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