Question

In the $V-T$ diagram shown in adjoining figure, what is the relation between $p$₁ and $p$₂?

• A. $p_{2} = p_{1}$
• B. $p _{2} < p_{1}$
• C. $p _{2} > p_{1}$
• D. insufficient data

Answer 1

Answer: (B)

In an isobaric process, $p=$ constant
Hence, $V \propto T$
i.e., $V=\left(\frac{n R}{p}\right) T$
$\therefore V-T$ graph is a straight line with slope $\propto \frac{1}{p}$
According to given figure, (slope) $_{2}>(\text { slope })_{1}$
$\therefore p_{2} < p_{1}$