States of Matter - Result Question 34
34. In van der Waals’ equation of state for a non-ideal gas, the term that accounts for intermolecular forces is
(1988, 1M)
(a) $(V-b)$
(b) $R T$
(c) $\left(p+\dfrac{a}{V^{2}}\right)$
(d) $(R T)^{-1}$
Show Answer
Answer:
Correct Answer: 34. (c)
Solution:
In van der Waals’ equation of state
$ \left(p+\dfrac{a}{V^{2}}\right)(V-b)=R T \quad $ (For 1 mole)
The first factor $\left(p+a / V^{2}\right)$ correct for intermolecular force while
the second term $(V-b)$ correct for molecular volume.
BETA
