5.6 In Example 5.2, Eqn (3) indicates that the change in Gibbs energy under isothermal conditions is given by G2G1=RTln(f1f2). Combine Eqn (1) with Eqn (2.1-5) to show that (W~s)rev=RTln(f1f2), which can be used to estimate the work interaction of a steady-flow system under reversible and isothermal conditions. Carbon dioxide is compressed in a reversible isothermal steady-state flow process from 3bar and 350K to 70bar. Determine the work of compression per mole of carbon dioxide using the Peng-Robinson equation of state. (Answer: 8509J/mol )