Question

Molar volume of $C{O}_2$ is maximum at

• A. NTP
• B. $0^{\circ }C$ and 2.0 atm
• C. $127^{\circ }$ and 1 atm
• D. $273^{\circ }C$ and 2.0 atm

Answer 1

Answer: (C)

$PV=nRT$ Here $n=1V=\frac{RT}{P}$
At $NTPV=\frac{R\times 273}{1}=273R$
At $0^{\circ }C(273K)$ and $2atmV$
$=\frac{R\times 273}{2}=\frac{273R}{2}$
At $127^{\circ }C(400K)$ and $atmV=\frac{R\times 400}{1}=400R$
At $273^{\circ }C(546K)$ and $2atmV=\frac{R\times 546}{2}=273R$
Thus, molar volume is maximum at $127^{\circ }C$ and $1atm$ pressure