Question

The gas equation for a real gas is:
$P(V-b)=RT$
Here, the parameter ${}^{\prime }{b}^{\prime }$ is van der Waals' constant. The graph of pressure against temperature (isochore) will give straight line of slope.

• A. Zero
• B. $\frac{R}{(V-b)}$
• C. $R/P$
• D. Negative

Answer 1

Answer: (B)

$\frac{R}{(V-b)}$

$P(V-b)=RT$
$P=\frac{RT}{(V-b)}$
When $P$ is plotted against $T$, the slope obtained is $\frac{R}{(V-b)}$.