Note:
These problems are from your 5
th
edition of the textbook. The due date is Tuesday, July 8
th
, 2008. No late homework
accepted.
Chapter 13, Problem 25C.
Consider a rigid tank that contains a mixture of two ideal gases. A valve is opened and some gas escapes. As a result,
the pressure in the tank drops. Will the partial pressure of each component change? How about the pressure fraction of
each component?
Chapter 13, Problem 40.
A rigid tank contains 1 kmol of Ar gas at 220 K and 5 MPa. A valve is now opened, and 3 kmol of N
2
gas is
allowed to enter the tank at 190 K and 8 MPa. The final mixture temperature is 200 K. Determine the pressure of the
mixture, using (
a
) the idealgas equation of state and (
b
) the compressibility chart and Dalton’s law.
Figure P1340
Chapter 13, Problem 41.
Reconsider Prob. 13–40. Using EES (or other) software, study the effect of varying the moles of nitrogen
supplied to the tank over the range of 1 to 10 kmol of N
2
. Plot the final pressure of the mixture as a function of the
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 Summer '08
 Husanu
 Thermodynamics, Entropy

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