Question

A gas in an open container is heated from $27{}^{\circ }C$ to ${127}^{\circ }C$. The fraction of the original amount of the gas remaining in the container will be :

• A. 3/4
• B. 1/2
• C. 1/4
• D. 1/8

Answer 1

The correct option is A 3/4

According to ideal gas equation

$n_1{T}_1=n_2{T}_2$

$n_1\times 300=n_2\times 400$

$n_2=\frac{3\times n_1}{4}$

Fraction of moles of gas left will be,
$\frac{n_2}{n_1}=\frac{3n_1}{4n_1}=\frac{3}{4}$

Hence option A is correct.