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  • Need clarity, kindly explain! - Thermodynamics - JEE Main

A system goes from A to B via two processes I and II as shown in figure. If  \Delta U_{1}  and \Delta U_{2} are the changes  in internal energies in the processes I and II respectively, then 

  • Option 1)

    \Delta U_{2}>\Delta U_{1} \;

  • Option 2)

    \; \Delta U_{2}< \Delta U_{2}\;

  • Option 3)

    \; \Delta U_{1}= \Delta U_{2}\; \;

  • Option 4)

    relation between \Delta U_1\: \: and\, \, \Delta U_2\:  can not be determined

 

Answers (1)

As we learnt in 

Property of internal energy -

U (internal energy) is a state function.

- wherein

i.e. It depends only on initial and final state.

 

Change in internal energy depends only at initial and final stage. 

\therefore \Delta U_{1} = \Delta U_{2} 

 


Option 1)

\Delta U_{2}>\Delta U_{1} \;

This option is incorrect.

Option 2)

\; \Delta U_{2}< \Delta U_{2}\;

This option is incorrect.

Option 3)

\; \Delta U_{1}= \Delta U_{2}\; \;

This option is correct.

Option 4)

relation between \Delta U_1\: \: and\, \, \Delta U_2\:  can not be determined

This option is incorrect.

Posted by

Vakul

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