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For an isothermal process heat added to an ideal system versus work performed by that system is represented graphically:

Correct answer: B. B

  • A. A
  • B. B
  • C. C
  • D. D

Explanation

For an isothermal process, the heat added to an ideal system versus work performed by that system is represented graphically as a straight line passsing through origin.. This is because the first law of thermodynamics states that the heat added to a system is equal to the work done by the system plus the change in internal energy of the system. In an isothermal process, the internal energy of the system does not change, so the heat added to the system is equal to the work done by the system.

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About First Law of Thermodynamics

The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.

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