R601a-enthalpy+entropy equations

Hi guys..I could use some help for my degree paper..I have to find:
-Entropy and enthalpy equatons for R601a(isopentane)
(through any method)
or
-I have the general entropy-enthalpy equations,that came out as a result of Martin-Hou equation of state,and i just need the specific constants that match them...
Does anybody knows how to get them?Please help me,i am in a major crisis here...:rolleyes:

thanx...

Try looking for this book in your school library. It seems to me this might have exactly what you are looking for...

http://www.amazon.com/Properties-Gas.../dp/0070517991

Have good time number crunching.;)