# A rigid tank contains 1 lb mol of argon gas at 400 R and 750 psia. A valve is now opened, and 3 lb mol of N2 gas is allowed to enter the tank at 340 R and 1200 psia.

A rigid tank contains 1 lb mol of argon gas at 400 R and 750 psia. A valve is now opened, and 3 lb mol of N2 gas is allowed to enter the tank at 340 R and 1200 psia. The final mixture temperature is 360 R. Determine the pressure of the mixture, using

(a) The ideal-gas equation of state and

(b) The compressibility chart and Dalton’s law.

(a) The ideal-gas equation of state and

(b) The compressibility chart and Dalton’s law.

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## Thermodynamics An Engineering Approach

**ISBN:** 978-0073398174

8th edition

**Authors:** Yunus A. Cengel, Michael A. Boles

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