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CSS Solved Papers
Physics Chemistry

Engineering :: Thermodynamics

  In a certain process the heat flow into a system is 25 Btu. What is the change in internal energy if the work done by the system in the process is 55 Btu ?
[A]. 30 Btu[B]. 80 Btu
[C]. 30 Btu[D]. 80 Btu

Answer: Option C
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