Question

Which of the following volume $\left(V\right)$-temperature $\left(T\right)$ plots represents the behaviour of one mole of an ideal gas at one atmospheric pressure?

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

Volume of 1 mole of an ideal gas at $273\text{K}$ and 1 atm is $22.4\text{L}$ and that at $373\text{K}$ and 1 atm pressure is calculated as:
$V=\frac{RT}{P}=\frac{0.082\times 373}{1}$
$=30.58L=30.6\text{L}$

From Charle's law at constant P,

$V\propto T$

and the graph can be represented as

Which corresponds to the values given in option C