A monatomic ideal gas initially fills a V0 = 0.45 m3 container at P0 = 85 kPa. The gas undergoes an isobaric expansion to V1 = 1.4 m3. Next it undergoes an isovolumetric cooling to its initial temperature T0. Finally it undergoes an isothermal compression to its initial pressure and volume. 1) Calculate the change in internal energy by the gas, ΔU2, in kilojoules, during the isovolumetric cooling (second process).  2) Calculate the work done by the gas, W3, in kilojoules, during the isothermal compression (third process).  3) Calculate the change in internal energy, ΔU3, in kilojoules, during the isothermal compression (third process).  4) Calculate the heat absorbed Q3, in kilojoules, during the isothermal compressions (third process).

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