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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 $\inline CO_{2}$  solid, liquid or gas at

(a) $\inline -70^{\circ}C$ under $\inline 1\; atm,$