Thermodynamics Question 20

Question 20 - 01 February - Shift 2

For three low density gases A, B, C pressure versus temperature graphs are plotted while keeping them at constant volume, as shown in the figure.

The temperature corresponding to the point ’ $K$ ’ is:

(1) $-273^{\circ} C$

(2) $-100^{\circ} C$

(3) $-373^{\circ} C$

(4) $-40^{\circ} C$

Show Answer

Answer: (1)

Solution:

Formula: Isochoric process

For isochoric process

$\frac{P}{T}=n \frac{R}{V}=$ cons tan $t$

$P=\frac{nR}{V}(t+273)$

If $P=0 \Rightarrow t=-273^{\circ} C$