As shown in the figure below, a piston-cylinder assembly contains 20 g of air holding the piston against the stops, where the mass of the piston is 150 kg. The air, initially at 3 bar, 600 K, is slowly cooled until the piston just begins to move downward in the cylinder. The air behaves as an ideal gas, g = 9.81 m/s², and friction is negligible. Patm = 1 bar Piston T₁ = 600 K 3 har Stops -A=9.75 x 10³ m²

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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.