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  • In polytropic process, when polytropic index n is equal to one, then process isOption: 1 Constant Pressure Cooling<div class='qna-optio

In polytropic process, when polytropic index n is equal to one, then process is

Option: 1

Constant Pressure Cooling


Option: 2

Reversible adiabatic compression


Option: 3

Isothermal Compression


Option: 4

Constant volume heating


Answers (1)

best_answer

As we have learnt,

Reversible, Irreversible, Polytropic Process -

Reversible or Quasi-Static Process 

It is carried out in such a way that the system remains in a state of equilibrium. All changes occurring at any part of the process will be exactly reversed when the change in earned out in the opposite direction.

  • It involves slow changes during operation.

  • This process may occur in any direction. 

  • It gives rise to maximum work.

  • Here driving force and opposing force differ with each other by a small value.

 

Irreversible Process 

Here the direction of change can not be reversed by small changes in variables. All processes occurring naturally are reversible

  • It Involves fast changes during operation.

  • It is a unidirectional process. 

  • It gives rise to the network that is W rev. > W irr. 

  • Here, driving and opposing forces differ by a large amount.

 

Polytropic Process

PVm = constant is known as general or polytropic process 

If m= 0, the process is at constant pressure.

If m = I, the process is at isothermal. 

If m = m, the process is constant volume. 

If m = y, the process is at adiabatic. 

 

The value of molar specific heat is given as

\mathrm{C}_{\mathrm{m}}=\mathrm{C}_{\mathrm{v}} \quad \frac{(\gamma-\mathrm{m})}{1-\mathrm{m}}

-

As we have learnt,
Polytropic process is a process in which heat absorbed by the gas due to unit rise in temperature is constant , in other words a constant specific heat process (C).
So, when n=1 it is isothermal compression.

PV^{1}= Constant (Boyle's law) here n=1

Therefore, option number (3) is correct.

Posted by

chirag

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