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Q .11.21 Answer the following questions based on the P-T phase diagram of carbon dioxide:
(d) Is $\mathrm{CO}_2$ solid, liquid, or gas at
(a) $-70^{\circ} \mathrm{C}$ under 1 atm ,
Answers (1)
$\mathrm{CO}_2$ is vapour at $-70^{\circ} \mathrm{C}$ under 1 atm pressure as the point corresponding to this condition lies in the vapour region in the given P -T phase diagram of carbon dioxide.
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