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  • In an adiabatic expansion the product of pressure and volume :Option: 1 decreases            &

In an adiabatic expansion the product of pressure and volume :

Option: 1

decreases                                           


Option: 2

increases

          


Option: 3

remains constant                        


Option: 4

first increases, then decreases.


Answers (1)

best_answer

In an Adiabatic Process -\Delta Q= 0

 So  \Delta U + \Delta W = 0 \dots (First \ law \ of\ thermodynamics)

So, For expansion the work is done by the system, it means the work done is positive. So change in internal energy is negative. It means that the internal energy decreases.and hence temperature decreases.

 \therefore from equation of state of ideal gas

   PV = nRT   \Rightarrow As temperature decreases then The product of P and V decreases.

 

 

Posted by

Pankaj Sanodiya

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