A mole of He has an initial temperature Ta and occulies a volume Va. The gas undergoes an isothermal transformation unti

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A mole of He has an initial temperature Ta and occulies a volume Va. The gas undergoes an isothermal transformation unti

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A mole of He has an initial temperature Ta and occulies a volume Va. The gas undergoes an isothermal transformation until if occupies a volume Vb=2Va. Then it undergoes another adiabatic transformation until it reaches a pressure equal to the initial one(Pc=Pa). Calculate the temperature and volumes of the gas in the states B and C,as well as the heat exchanges Q, the work W done in the process and the change in the internal energy of the gas.
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