If dU and dW represent internal energy and work done then which is true?
Correct answer: A. dU = -dW in Adiabatic Process
- A. dU = -dW in Adiabatic Process
- B. dU = dW in Isothermal Process
- C. dU = dW in Adiabatic Process
- D. dU = -dW in Isothermal Process
Explanation
In an Adiabatic process, the total heat is given by;Q = dU + dWWe also know that for an adiabatic process, Q = 0, therefore the equation becomes,dU + dW= 0Or, dU = -dW
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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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