Which of the following statements is correct for any thermodynamic system?

  • Option 1)

    The internal energy changes in all processes.

  • Option 2)

    Internal energy and entropy are state functions.

  • Option 3)

    The change in entropy can never be zero.

  • Option 4)

    The work done in an adiabatic process is always zero.

 

Answers (1)

As we learnt in 

Internal Energy -

It is energy possed by the system due to molecular motion and molecular configuration.

- wherein

For an ideal gas there is no molecular attraction hence Vp=0.

 

 Internal energy changes only when temperature change.


Option 1)

The internal energy changes in all processes.

This option is incorrect.

Option 2)

Internal energy and entropy are state functions.

This option is correct.

Option 3)

The change in entropy can never be zero.

This option is incorrect.

Option 4)

The work done in an adiabatic process is always zero.

This option is incorrect.

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