We consider a thermodynamic system. If `DeltaU` represents the increase in its internal energy and W the work done by the system, which of the following statements is true?A. `DeltaU=-W` is an adiabatic processB. `DeltaU=W` in an isothermal processC. `DeltaU=-W` in an isothermal processD. `DeltaU=W` in an adiabatic process

We consider a thermodynamic system. If `DeltaU` represents the increas

1.	We consider a thermodynamic system. If `DeltaU` represents the increase in its internal energy and W the work done by the system, which of the following statements is true?A. `DeltaU=-W` is an adiabatic processB. `DeltaU=W` in an isothermal processC. `DeltaU=-W` in an isothermal processD. `DeltaU=W` in an adiabatic process
Answer» Correct Answer - A An isothermal process is a constant temperature process. In this process T= constant or `DeltaT=0` `therefore" " DeltaU=nC_(v)DeltaT=0` An adiabatic process is defined as one with no heat trasfer into or out of a system . therefore , Q = 0 . From the first law of thermodynamics. ` W=-DeltaU " or " DeltaU=-W`

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