Question

The volume occupied by $4.75g$ of acetylene gas at $50^{\circ }C$ and $740mmHg$ pressure is_______$L$ (Rounded off to the nearest integer)
$[$ Given $R=0.0826L$ atm $K^{-1}mo{l}^{-1}]$

Answer 1

Answer: 5

Given Mass $=4.75g$

$\Rightarrow C_2{H}_2(g)$

$\Rightarrow$ Moles $=\frac{4.75}{26}mol$

Temp $=50+273=323K$

$P=\frac{740}{760}$ atm

$R=0.0826\frac{\ell atm}{molK}$

$\Rightarrow V=\frac{nRT}{P}$

$=\frac{4.75}{26}\times \frac{0.0826\times 323}{\left(\frac{740}{760}\right)}$

$\Rightarrow V=\frac{96314.078}{19240}$

$=5.0059\ell \simeq 5\ell$