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IESL Part II Mechanical Practice Questions - IESL Qualifying Examination Part II - Mechanical Engineering Exam

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A closed thermodynamic system undergoes a process during which 50 kJ of heat is added to the system, and the system performs 30 kJ of work on its surroundings. According to the First Law of Thermodynamics, what is the change in the internal energy of the system?
Correct Answer:
20 kJ

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