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Solved: What is the percent error in specific volume if
Chapter 2, Problem 164EUP(choose chapter or problem)
Problem 164EUP
What is the percent error in specific volume if the ideal gas model is used to represent the behavior of superheated ammonia at 100 F, 80 lbf/in.2? What if the generalized compressibility chart, Fig. D.1, is used instead?
FIGURE D.1 Lee–Kesler simple fluid compressibility factor.
Questions & Answers
QUESTION:
Problem 164EUP
What is the percent error in specific volume if the ideal gas model is used to represent the behavior of superheated ammonia at 100 F, 80 lbf/in.2? What if the generalized compressibility chart, Fig. D.1, is used instead?
FIGURE D.1 Lee–Kesler simple fluid compressibility factor.
ANSWER:
Solution 164 EUP
Step 1 of 4
We have to find the percent error in calculating the specific volume of superheated ammonia, if the ideal gas model is used to represent the behavior and also using the generalized compressibility chart.
The specific volume of superheated ammonia at 100 F, 80 lbf/in2 can be found from the Table F.8.2 in the book.
The specific volume of superheated ammonia using ideal gas equation is given by
where,
gas constant of ammonia
= 90.72 ft-lbf/lbm R
F = 559.67 R
80 lbf/in2
Thus,
Thus, the percent error in calculating specific volume using ideal gas equation is
.Therefore, the percent error in calculating specific volume using ideal gas equation is 5.3%