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During a process, 2 kJ of work are done on a system, and 3 kJ of heat are given away by the system. What is the change of internal energy of the system

Respuesta :

The change in the internal energy of the system is increased by 1 Kj.

Determination of the internal energy

According to the first law of thermodynamics,

  • Energy can only be changed in form; it cannot be generated or destroyed, according to the basic rule of thermodynamics.
  • External work or heat exchange over the barrier are all examples of energy transfer for any system. These result in a change in the control volume's energy reserves.

Therefore, Δ∪=q+w

[Δ∪= change of internal energy; q=heat; w=work]

Provided,

q= -3Kj (as heat is given away)

w= +2Kj (work done in the system is positive)

So, Δ∪= -3 + (+2) Kj

⇒Δ∪= -1 Kj

Therefore the internal energy of the system is increased by 1 kj.

Learn more about thermodynamics here:

https://brainly.com/question/1368306

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