What is the unit of the Van der Waals constan | vedclass

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(B) The Van der Waals equation is $(P + \frac{an^2}{V^2})(V - nb) = nRT$. From the pressure correction term,we have $P = \frac{an^2}{V^2}$. Rearrangin

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$atm \cdot L^2 \cdot mol^{-2}$

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(B) The Van der Waals equation is $(P + \frac{an^2}{V^2})(V - nb) = nRT$. From the pressure correction term,we have $P = \frac{an^2}{V^2}$. Rearranging for $a$,we get $a = \frac{P \cdot V^2}{n^2}$. Substituting the units: $P$ is in $atm$,$V$ is in $L$,and $n$ is in $mol$. Therefore,the unit of $a$ is $\frac{atm \cdot L^2}{mol^2}$ or $atm \cdot L^2 \cdot mol^{-2}$.

What is the unit of the Van der Waals constant $a$?

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