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A rigid tank initially contains air at 60 bar. A valve is opened and the pressure in the tank falls rapidly to 35 bar. To

A rigid tank initially contains air at 60 bar. A valve is opened and the pressure in the tank falls rapidly to 35 bar. To calculate the air temperature at the final state, it is convenient to choose “air remaining in the tank when the pressure reaches 35 bar” as the system.

a). Is this an open or a closed system?
b). Is it plausible to assume that the system undergoes an adiabatic process? Why?

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a The process underwent by air can certainly be considered as a flow process During this process the ... blur-text-image

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