A thermodynamic system undergoes a change of state during which it absorbs 100 kJ of heat and does 50 kJ of work. The system is then brought back to its original state through a process during which 1

Question

A thermodynamic system undergoes a change of state during which it absorbs 100 kJ of heat and does 50 kJ of work. The system is then brought back to its original state through a process during which 120 kJ of heat is absorbed by it. Find the work done by the system in the second process.

Answer:

170

Solution:

First process: $Δ U = 100 - 50 = 50$ kJ. Returning to the original state needs $Δ U = - 50$ kJ. Second process: $W = Q - Δ U = 120 + 50 = 170$ kJ.

TestHub · Accepted Answer

First process: Δ U = 100 − 50 = 50 kJ. Returning to the original state needs Δ U = − 50 kJ. Second process: W = Q − Δ U = 120 + 50 = 170 kJ.

Physics - Heat & Thermo Question with Solution | TestHub

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