Question

In Van der Waal's equation of state, the unit of 'a' and 'b' are $atm.litr{e}^2.mo{l}^{-2}$and $litre.mo{l}^{-1}$.

• A. True
• B. False
• C. Ambiguous
• D. None of these

Answer 1

The correct option is A True

The equation relates three state variables: the pressure of the fluid p, the total volume of the fluid's container V, the number of particles N, and the absolute temperature of the system T. The intensive, microscopic form of the equation is:

$(P+\frac{n^{2}a}{V^2})(V-nb)=nRT$

The units of $a$ and $b$ are expressed in the units of pressure and volume as the unit of $a$ is $atm.L^2.mo{l}^{-2}$ that of $b$ is $L.mo{l}^{-1}$.