Question

The constants "a" and "b" in the van der waals equation are "empirical coefficients". What exactly does that mean?

Show that the units for "a" and "b" are appropriate for the the Van der Waals equation?

Answer 1

We don't do your homework for you but below are several good site to get the information you need. By the way, changing screen names slows our responses so it is your best interest to keep the same name.
http://en.wikipedia.org/wiki/Van_der_Waals_equation

http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/waal.html

http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/waal.html

http://chemistry.about.com/od/workedchemistryproblems/a/Ideal-Gas-Vs-Non-Ideal-Gas-Example-Problem.htm