First law of thermodynamics is mathematically represented as:
Correct answer: E. ΔU = ΔQ-ΔW
- A. ΔW=ΔQ+ΔU
- B. ΔU=ΔW-ΔQ
- C. ΔQ=ΔW-ΔU
- D. ΔQ=ΔU-ΔW
- E. ΔU = ΔQ-ΔW
Explanation
Option E is the correct representation of first law of thermodynamics.
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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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