Agas expands such that its initial and final temperature are equa… - Vidyadip

MCQ

Agas expands such that its initial and final temperature are equal. Also, the process followed by the gas traces a straight line on the $P-V$ diagram :

A
The temperature of the gas remains constant throughout.
B
The temperature of the gas first increases and then decreases
C
The stright line has a negative slope.
✓
both $(B)$ and $(C)$

✓

Answer

Correct option: D.

both $(B)$ and $(C)$

d
The slope of straight line can't be tve. since, $\mathrm{T} \propto \mathrm{PV}$ and if slope is $+ve$, then both $\mathrm{P}$ and $\mathrm{V}$ are increasing. Therefore, temperature will always increase.

$\mathrm{T}_{1}<\mathrm{T}_{2}<\mathrm{T}_{3}<\mathrm{T}_{4}$

Thus, from graph it can be seen, that temperature first increases and then decrease.

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