Calculate the heat absorbed by the system in going through the process as shown in figure.
Correct answer: B. 3.14 x 10^7 J
- A. 31.4J
- B. 3.14 x 10^7 J
- C. 3.14J
- D. None
Explanation
Q=∆U+W cyclic process i.e. ∆U=0 Q=W=Area pf P-V graph= πr² =π(Pr)(Vr) =3.14(100x103)(100)=31.4x106 J
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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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