In van dar Wall equation $\left[P+\frac{a}{V^2}\right]\left[V-b\right]=RT;P$  is pressure, V is volume, R is universal gas constant and T is temperature. The ratio of constants $\frac{a}{b}$  is dimensionally equal to:

<p>dimension of a Pv²</p><p>&nbsp; &nbsp; &nbsp; &nbsp; <span class="mathml" contenteditable="false"> <math> <mrow> <mfrac> <mrow> <mi>a</mi> </mrow> <mrow> <mi>b</mi> </mrow> </mfrac> <mo>=</mo> <mi>p</mi> <mi>v</mi> </mrow> </math> </span> &nbsp; &nbsp; &nbsp;dimension of b = v</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;!- [if gte mso 9]>&lt;xml&gt; <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1025" DrawAspect="Content" ObjectID="_1814261219"> </o:OLEObject>&lt;/xml&gt;&lt;! [endif]-&gt;&nbsp;</p>

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