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

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

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question:

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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