First slide

Gaseous state

Question

A gas in an open container is heated from 27°c to 127°C. The fraction of the original arnount of the gas remaining in the container will be

Moderate

A

$\frac{3}{4}$
B

$\frac{1}{2}$
C

$\frac{1}{4}$
D

$\frac{1}{8}$

Solution

pV = nRT
$n \propto T^{- 1} \Rightarrow \frac{n_{2}}{n_{1}} = \frac{T_{1}}{T_{2}} = \frac{300}{400} = \frac{3}{4}$

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