Задача 20407.

A certain amount of oxygen occupies a volume of 1 m^3 and is under a pressure of 0.2 MPa. The gas is heated first at constant pressure to a volume of 3 m^3, and then at constant volume to a pressure of 0.5 MPa. Determine the change in the internal energy of the gas, the work done by it and the amount of heat transferred to the gas.

Detailed solution with a brief record of the conditions, formulas and laws used in the solution, derivation of the calculation formula and answer.
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