Question

When the volume of a gas is plotted versus the Celsius temperature with pressure and number of moles held constant, the X-intercept is at what temperature?

• A. $0^0$C
• B. $-{273}^0$C
• C. The b.p of the gas
• D. The m.p of the gas

Answer 1

The correct option is B $-{273}^0$C

According to Charle's Law, volume of gas is directly proportional to temperature in kelvin scale.

$⟹\frac{C-0}{100}=\frac{K-273}{100}⟹K=C+273$

$⟹$ $V=\left(constant\right)\left[K\right]$ [Charles's Law]

$⟹$ $V=\left(constant\right)[C+273]$

So, the intercept for $V$ and $C$ is $-{273}^{o}C$.