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Question: Answered & Verified by Expert
The term that corrects for the attractive forces present in a real gas in the van der Waals' equation is
ChemistryStates of MatterJEE AdvancedJEE Advanced 2009 (Paper 1)
Options:
  • A
    $n b$
  • B
    $n^2 a / V^2$
  • C
    $-\left(n^2 a / V^2\right)$
  • D
    $-n b$
Solution:
1388 Upvotes Verified Answer
The correct answer is:
$n^2 a / V^2$
In the van der Waals' equation
$$
\left(p+\frac{n^2 a}{V^2}\right)(V-n b)=n R T
$$
The pressure correction factor $\left(n^2 a / V^2\right)$ accounts for intermolecular attraction in real gas.

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