States of Matter 1 Question 15
15. The given graph represent the variations of $Z$ (compressibility factor $(Z)=\frac{p V}{n R T}$ ) versus $p$, for three real gases $A, B$ and $C$. Identify the only incorrect statement.
(a) For the gas $A, a=0$ and its dependence on $p$ is linear at all pressure
(b) For the gas $B, b=0$ and its dependence on $p$ is linear at all pressure
(c) For the gas $C$, which is typical real gas for which neither $a$ nor $b=0$. By knowing the minima and the point of intersection, with $Z=1, a$ and $b$ can be calculated
(d) At high pressure, the slope is positive for all real gases
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Solution:
- Option (b) is incorrect statement because at high pressure slope of the line will change from negative to positive.
