This model is designed for the study of cyclic processes. You can select cycles of various shapes, and to determine the efficiency η for each cycle on the (p, V) plane. The quantity of heat added to the system (Q) , the work produced (W) and the change ΔU of the internal energy are displayed on the energy diagram.
Note that after completing a cycle, total work done is numerically equal to the cycle?s area, and the change in the experimental substance?s internal energy equals zero.
The working substance in the model constitutes 1 mole of a mono-atomic ideal gas.