The Figure Shows a PV Diagram of a Gas for a Complete

Short Answer

The figure shows a pV diagram of a gas for a complete cycle. During part bc of the cycle, 1190 J of heat flows into a system, and at the same time the system expands against a constant external pressure of $7.00 \times 10 ^ { 4 } \mathrm {~Pa}$ as its volume increases from $0.0200 \mathrm {~m} ^ { 3 }$ to $0.0800 \mathrm {~m} ^ { 3 }$ Calculate the change in internal (thermal)energy of the system during part bc of the cycle. If the change is nonzero, be sure to indicate whether the change is positive or negative.