Interpretation:
Determine the final temperature and work produced of the compressedn-butane gas, compressed isentropically in a steady state process.
Concept Introduction:
The entropy change by appropriate generalized correlations is
Answer to Problem 6.60P
Temperature is
Work done is
Explanation of Solution
Given information:
It is given that n-butane gas compressed isentropically from
Process is isentropically, so
From equation (2),
Initial state
For pure species n-butane, the properties can be written down using Appendix B, Table B.1
So, at above values of
At
At
At
At
And
At
At
At
At
Applying linear interpolation of two independent variables, From linear double interpolation, if
And
Now, from equation,
Or
And
Or
Considering at final state gas is an ideal gas.
Hence,
Now,
Hence,
Values of constants forn-butane in above equation are given in appendix C table C.1 and noted down below:
Now, for work produced
And enthalpy change by generalized correlations is given by,
Where
Hence,
Temperature is
Work done is
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