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A rigid tank contains 0.08 m3 of air (R = 286.7 J / (kg ° C)) at a pressure of 20 MPa and
25 ° C. Through a valve, a little of the gas is slowly released until its
pressure is one tenth of the initial. Considering that the process is isothermal and that the
gas can be analyzed as ideal, determining the mass of gas that was let out.
a) 3.6 kg
b) 1,872 kg
c) 16.85 kg
d) 20.45

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