The term that accounts for intermolecular force in Van der Waals equation is:
The term that accounts for intermolecular force in Van der Waals equation is: Correct Answer (P + a/V<sup>2 </sup>)
The correct answer is (P + a/V2 )
CONCEPT:
- Real gases show deviation from ideal gas law because molecules interact with each other.
- Due to intermolecular attractions pressure exerted by the gas is lower than the pressure exerted by the ideal gas.
- pideal = preal + an2/V2
- a is a constant
EXPLANATION:
- Van der Waals equation for n moles of a gas is (P + an2/V2 )(V - nb) = nRT
- Constants 'a' and 'b' are called Van der Waals constants.
- Value of 'a' is a measure of the magnitude of intermolecular attractive forces within the gas and is independent of temperature and pressure.
- 'nb' is approximately the total volume occupied by the molecules.
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Feb 20, 2025