A fixed mass of an ideal gas is contained in a piston-cylinder assembly. The pressure and temperature at the initial stage are P1 = 350 kPa and T1 = 600 K. The gas has a molecular weight M = 28 kg / kmol and the constant volume specific heat is Cv = 750 J / kg-K. The initial volume is V1 = 0.50 m^3. The gas is cooled slowly to T2 = 300 K while the pressure remains constant. Find the following: The cylinder volume V2 after the gas has been cooled to 300 K. The mass of the gas in the cylinder, m. The change in the internal energy of the gas, ΔU. The heat transferred, Q. The work done, W Note: Universal gas constant: R prime = 8314.34 J/kmol-K     and Specific gas constant:  R = R prime / M

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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.