The Figure Shows A $p V$ Diagram of a Gas for a Complete Cycle

Short Answer

The figure shows a $p V$ diagram of a gas for a complete cycle. During part $b c$ of the cycle, $1190 \mathrm {~J}$ 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 $b c$ of the cycle. If the change is nonzero, be sure to indicate whether the change is positive or negative.