The state of an ideal gas was changed isobarically. The graph depicts three such isobaric lines. Which of the following is true about the pressures of the gas?
KVPY 2015, Diffcult
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(b)
Equation of state for ideal gas is $p V=n R T \Rightarrow V=\frac{n R}{p} \cdot T$
This is equation of line with slope $=\frac{n R}{p}$
$\Rightarrow \quad$ Slope $\propto \frac{1}{p}$
So, from graph, $p_3 < p_2 < p_1$.
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