The figure below shows a reversible cycle to which 2 moles of an ideal gas are subjected. monatomic. At point A the pressure and volume are V0 and p0 and at point C are 2V0 and 2p0 respectively. Analyze the statements below. Consider the following statment: 1) The cycle efficiency of the figure is less than 0.1   I know that the formula is Efficiency = Total Work / Heart Absorbed   My question is : Why the heat absorbed is the sum of process AB and BC only? Why don't we consider CD and DA?

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