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We consider a thermodynamic system. If D...

We consider a thermodynamic system. If `DeltaU` represent the increase in the its energy and W the work done by the system, which of the following statements is true?

A

`DeltaU=-W` in an isothermal process

B

`DeltaU=-W` in an adiabatic process

C

`DeltaU=W` in an isothermal process

D

`DeltaU=W` in an adibatic process

Text Solution

Verified by Experts

The correct Answer is:
b
According to the first law of thermodynamics `DeltaQ=DeltaU+W`
In an adiabatic process, `DeltaQ=0`. Therefore, `DetaU=-W`
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FULL MARKS-HEAT AND THERMODYNAMICS-ADDITIONAL QUESTIONS SOLVED (I. Choose the correct answer from the following)
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  18. Which of the following process is reversible ?

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