I have not done any physics in ages and have recently started studying it. The first chapter in my book deals with the ideal gas constant:
$$pV=nRT$$
It is rewritten as:
$$R=\frac{pV}{nT}$$
When I write it in SI units, it looks like this:
$$8.31\frac{\rm J}{\rm mol\,K} = \frac{(\rm Pa)(m^3)}{\rm (mol)(K)}$$
How does $\rm (Pa)(m^3)$ translate into joules?