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The equation of 1st Law of thermodynamics is:

Correct answer: E. B and A

  • A. Q= ∆U+W
  • B. ΔU= Q-W
  • C. W= Q+ ∆U
  • D. Q= W
  • E. B and A

Explanation

The first law of thermodynamics is given as ΔU = Q - W or Q = ΔU + W, where ΔU is the change in internal energy of a system, Q is the net heat transfer (the sum of all heat transfer into and out of the system), and W is the net work done (the sum of all work done on or 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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