A closed rigid container has a volume 1m' and holds air at 345 kPa and 20 °C. Heat is added until the temperature is 327 °C. Determine the change in internal energy. R 287J/kg k CV = 718 J /kg k, Cv.2 = 768 J/ kg .k a/ using an average value of specific heat b/ considering the variation of specific heat with temperature. %3D Take AU = m Au

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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.