A frictionless piston - cylinder device contains 420 moles of ideal gas at 2 atm and 155 °C. Heat is now transferred to the gas until the temperature reaches 400 °C. If the piston is not attached to a shaft ( Pressure stays constant) and its mass is constant, determine the work (J) done by the gas during this process. Gas constant = 8.21x10-5 (m3.atm/K.mol)

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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.