a. Using only the steam tables, compute the fugacity of steam at 400C and 2 MPa, and

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a. Using only the steam tables, compute the fugacity of steam at 400°C and 2 MPa, and at 400°C and 50 MPa.

b. Compute the fugacity of steam at 400°C and 2 MPa using the principle of corresponding states. Repeat the calculation at 400°C and 50 MPa. 

c. Repeat the calculations using the Peng-Robinson equation of state. Comment on the causes of the differences among these predictions.

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