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  • Help me solve this Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas ? (Assume non-expansion work is zero)

Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas ? (Assume non-expansion work is zero)

  • Option 1)

    Isochoric process : \Delta U=q

  • Option 2)

    Adiabatic process : \Delta U=-w

  • Option 3)

    Isothermal process: q=-w

     

  • Option 4)

    Cyclic process : q=-w

Answers (1)

best_answer

Adiabatic process :-q=0

According to first law of thermodynamics

\Delta V=q+w

So,\Delta V=w

Hence option 2 is incorrect.

 


Option 1)

Isochoric process : \Delta U=q

Option 2)

Adiabatic process : \Delta U=-w

Option 3)

Isothermal process: q=-w

 

Option 4)

Cyclic process : q=-w

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