If the reaction is carried out at constant volume and no work is done, then the change in internal energy is equal to which factor?
Correct answer: D. Heat
- A. Enthalpy
- B. Work
- C. Entropy
- D. Heat
Explanation
As the first law of thermodynamics is given byΔU = ΔQ - ΔWwhere ΔU is the change in internal energyΔQ is the heat addedand ΔW is the work doneIf the work done on the system is 0 then according to the equation the change in internal energy is equal to heat.ΔU = ΔQ - 0ΔU = ΔQ.
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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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