An ideal gas at a pressure of 4120 kPaa and a temperature of 25 oC is contained in a cylinder with a volume of 20 m3. A certain amount of the gas is released so that the pressure in the cylinder drops to 1730 kPaa. Expansion of the gas is isentropic. The heat capacity ratio is 1.4 and the gas constant is 0.286 kJ/kgoC. Determine the mass of gas remaining in the cylinder, in kg.

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A: The given information in the problem is shown in the following attached image:

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Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.