to determine the fugacity of steam at 400oC and 15 MPa. What value does the fugacity coefficient

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Thermodynamics tables and charts may be used when both H and S are tabulated. Since G = H – TS, at constant temperature, ΔG = RT*ln(f2/f1) = ΔH – TΔS. If state 1 is at low pressure where the gas is ideal, then f1 = P1, RT*ln(f2/P1) = ΔH – TΔS, where the subscripts indicate states. Use this method to determine the fugacity of steam at 400oC and 15 MPa. What value does the fugacity coefficient have at this pressure?

Hint:

Use superheated steam tables at the lowest pressure for T1 = 400oC to find the values you need for state 1.

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