# Two kg of N2 at 450 K, 7 bar is contained in a rigid tank

## Problem 12.31 Chapter 12

Fundamentals of Engineering Thermodynamics | 8th Edition

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Problem 12.31

Two kg of N2 at 450 K, 7 bar is contained in a rigid tank connected by a valve to another rigid tank holding 1 kg of O2 at 300 K, 3 bar. The valve is opened and gases are allowed to mix, achieving an equilibrium state at 370 K. Determine (a) the volume of each tank, in m3 . (b) the final pressure, in bar. (c) the heat transfer to or from the gases during the process, in kJ. (d) the entropy change of each gas, in kJ/K.

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