Question

In the following $V-T$ diagram, 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. cannot be predicted

Answer 1

Answer: (C)

$P_2$ < $P_1$

The equation of state for an ideal gas is:
$PV=nRT$
$V=\frac{nR}{P}T$ i.e between the two graphs the slope of graph 2 is larger.

And the slope of the straight line is inversely proportional to the pressure.
Since slope of 2 is larger.
$P_1$ is larger i.e. $P_1>P_2$
Option C is correct.