The first law of thermodynamics in terms of an adiabatic process is:
Correct answer: C. W = -ΔU
- A. Q = ΔW/V
- B. W = -Q
- C. W = -ΔU
- D. Q = ΔU
Explanation
In an adiabatic system, there is no heat exchange between the system and its environment so Q = 0. So, the first law of thermodynamics in terms of an adiabatic process would be:Q = W + ΔU (here Q=0)0 = W + ΔUW = -ΔU
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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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