Question 286: 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 :

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: