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Which statement about the first law of thermodynamics is correct?

Correct answer: B. The increase in the internal energy of a system equal to the heating of the system minus the work done by the system

  • A. The heating of a system equal to the increase of its internal energy plus the work done on the system
  • B. The increase in the internal energy of a system equal to the heating of the system minus the work done by the system
  • C. The increase in the internal energy of system equal to the heating of the system plus the work done by the system
  • D. The work done on a system equals the increase of its theramal energy plus the heating of the system

Explanation

Statement of first law of thermodynamics states the increase in the internal energy of a system equal to the heating of the system minus the work done by the system work done by the system is negative work done on the system is positive

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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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