Define the compressibility factor (Z) from (a) Virial equations, and (b) Redlich-Kwong equation?

Answer 1

This kind of high-level chemistry is beyond me, but here's a good place to start:

http://en.wikipedia.org/wiki/Virial_theorem
http://en.wikipedia.org/wiki/Equation_of_state#Redlich-Kwong_equation_of_state