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Reversible, Irreversible, Polytropic Process is considered one of the most asked concept.
11 Questions around this concept.
Reversible Isobaric Process
A gas undergoes a reversible isobaric compression. Its initial temperature is , initial volume is
, and its final volume is
. If the pressure remains constant at
during the process, calculate the final temperature.
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 carried out in the opposite direction.
It involves slow changes during operation.
This process may occur in any direction.
Here driving force and opposing force differ with each other by a very 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.
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 constant pressure.
If m = 1, the process is isothermal.
If m = , the process is adiabatic.
Thermodynamic Equilibrium
A system in which the macroscopic properties do not undergo any change with time is called thermodynamic equilibrium.
If a system is heterogeneous and is in equilibrium, the macroscopic properties in the various phases remain unchanged with time.
Types: It is of three types-
(i) Mechanical Equilibrium
Here no mechanical work is done by one of the systems on another part of the system and it is possible if the pressure remains the same throughout the system that is, there is no flow of matter from one part to another
(ii) Thermal Equilibrium
There is no flow of heat from one part to another that is, the temperature is constant.
(iii) Chemical Equilibrium
There is no change in the composition of any part of the system with time.
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