Calculate the fugacity and the fugacity coeffi cient of phenol in a mixture of 20 mole % phenol (1) and 80 mole % oxygen (2) at 694.2 K and 24.52 bar using the following:

(a) The ideal gas law

(b) The Lewis fugacity rule (choose the method that gives you as accurate an answer as possible)

(c) The Redlich-Kwong equation of state 

Rank the answers in Parts (a)–(c) from most accurate to least accurate.