Question 228: Thermodynamics & KTG

Question

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 '$\mathrm{K}$' is :
![](https://app-content.cdn.examgoal.net/fly/@width/image/1ldodcves/2218923a-7386-44ce-be1e-d12e1cb25520/7a1f7350-a3ab-11ed-bed3-417993225459/file-1ldodcvet.png?format=png)

Accepted Answer

In thermodynamics, the pressure-temperature graph for an ideal gas kept at constant volume (isochoric process) is a straight line. This is because for an ideal gas, the pressure is proportional to the temperature (as described by the ideal gas law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature).
It is clear from graph that for all the gases lines of graphs meet at same value.
At $\mathrm{x}$-axis (temperature axis) $\mathrm{P}$ is zero but temperature is negative and it will be equal to 0 K or $-273^{\circ} \mathrm{C}$.

Answer

$-273^{\circ} \mathrm{C}$

Answer

$-373^{\circ} \mathrm{C}$

Answer

$-100^{\circ} \mathrm{C}$

Answer

$-40^{\circ} \mathrm{C}$

Thermodynamics & KTG

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 '\mathrm{K}' is :

Choose the correct answer: