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  • A given system undergoes a change in which the work done by system equals the decrease in its internal energy. The system must have undergone an Option: 1</

A given system undergoes a change in which the work done by system equals the decrease in its internal energy. The system must have undergone an 

Option: 1

Isothermal change 


Option: 2

Adiabatic change 


Option: 3

Isobaric change 


Option: 4

Isochoric change 


Answers (1)

best_answer

As we have learned

First law in Adiabatic Process -

\Delta Q= \Delta U\, + \Delta W
 

- wherein

Since \Delta Q= 0

(in  Adiabatic Process )

\Delta U+\Delta W = 0

 

 By the first law of thermodynamic 

\Delta Q = \Delta U + \Delta W

For the adiabatic process, there is no exchange of heat b/w the system and surrounding 

i.e \Delta Q =0

So  \Delta U +\Delta W =0

\Delta W =- \Delta U

Work done by system equals to decrease in internal energy 

Posted by

seema garhwal

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