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Answer: The constants a and b of the Van der Waals equation are properties that are unique to a particular type of natural gas. If you have a higher value for ‘a’, the force of attraction between the gas particles will be more potent. The constant ‘an’ is responsible for correcting the force of attraction between the gas particles. The value of and also provides information about the temperature at which the gases boil. A gas’s volume can be measured using the Van der Waal constant, also referred to as the co-volume of the gas.
We get the required unit of Van der Waal’s constant a=Atm×litre2mol−2
- The equation is a modified version of the Ideal gas equation.
P+ an 2 V2 (V – nb) = nRT,
Where,
P, V, T & n, are pressure, volume, temperature and moles
of gas. /a/ and /b/ are van der waal • constant..
Units of Van der waals Constant:
- Unit of “a” is atm Lit2 mol-2
- Unit of “b” is Litre mol-1
