Question

Volume versus temperature graphs for a given mass of an ideal gas are shown in figure at two different values of constant pressure. What can be inferred about relation between $P_1$ and $P_2$ ?

• A. $P_1 > P_2$
• B. $P_1 = P_2$
• C. $P_1 < P_2$
• D. data is insufficient

Answer 1

Answer: (A)

According to Charles law
$V \propto T$ or $\quad \frac{V}{T} =$ constant $= \frac{1}{P}$
As in graph, slope at $P_{2}$ is more than slope at $P_{1}$,
$\therefore \quad P _{1} > P_{2}$