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The figure shows the pV diagram for a certain thermodynamic process. In this process. 1510 J of heat flows into a system. and at the same time the system expands against a constant extemal pressure of 4 x 104 Pa. If the volume of the system increases from 0.020 m3 to 6.10-2 m3. Calculate the change in internal (thermal) energy of the system. If the internal (thermal) energy change is nonzero. be sure to indicate whether this energy change is positive or negative.

1852_The pV diagram for a certain thermodynamic process.png

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