Oxygen with a mass m = 2 kg occupies a volume V1 = 1 m3 and is under pressure p1 = 0.2 MPa. The gas was heated first at constant pressure to a volume V2 = 3 m3, and then at constant volume to a pressure p3 = 0.5 MPa. Find the change ΔU of the internal energy of the gas, the work A performed by it and the amount of heat Q transferred to the gas. Build a process graph.
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