One mole of gas is involved in the process, the graph of which is shown in the P, V diagram. Sections 1-2 and 3-4 of the graph are straight line segments whose continuations pass through the origin, and curves 1-4 and 2-3 are isotherms. Draw a graph of this process on the T, V diagram. Find the volume V₃ if the volumes V₁ and V₂ = V₄ are known.
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5.6 First Law of Thermodynamics. Heat capacity