Question

An L.P.G. cylinder weighs $14.8kg$ when empty. When full weighs $29kg$ and shows a pressure of $2.5atm$. In the coursed used at ${27}^{\circ }C$, the weight of the full cylinder reduced to $23.3kg$. Find out the volume of n-butane in cubic metres used up to ${27}^{\circ }C$ and $1atm$. [Mol. mass of butane $=58$].

Answer 1

Mass of n-butane used $=29-23.2=5.8kg$
Number of moles of butane used $=\frac{5800}{58}=100$
$V=\frac{nRT}{P}=\frac{100\times 0.0821\times 300}{1}$
$=2463litre$
$=2.463m^3$