Question

The diagram shows the graphs of pressure vs density for a given mass of an ideal gas at two temperatures T${}_1$ and T${}_2$ :

• A. T${}_1$ > T${}_2$
• B. T${}_1$ = T${}_2$
• C. T${}_1$ < T${}_2$
• D. Any of the three are possible

Answer 1

The correct option is B T${}_1$ = T${}_2$

$PV=nRT$
$P\propto \frac{1}{V}$ is equivalent to $P$ $\propto$ $d$.
The slope of P-d curve is proportional to temp
From the diagram, the slopes are equal
$\therefore$ temp T is equal for both.