ISOMETRIC, ISOBARIC, POLYTROPIC AND ADABARIC PROCESS

ISOMETRIC PROCESS 

-An isochoric process, also called a constant-volume process, an isovolumetric process, or an isometric process, is a thermodynamic process during which the volume of the closed system undergoing such a process remains constant. An isochoric process is exemplified by the heating or the cooling of the contents of a sealed, inelastic container: The thermodynamic process is the addition or removal of heat; the isolation of the contents of the container establishes the closed system; and the inability of the container to deform imposes the constant-volume condition. The isochoric process here should be a quasi-static process.

ISOBARIC PROCESS 

-An isobaric process is a thermodynamic process in which the pressure remains constant. This is usually obtained by allowing the volume to expand or contract in such a way to neutralize any pressure changes that would be caused by heat transfer.

The term isobaric comes from Greek iso, meaning equal, and baros, meaning weight.

POLYTEOPIC PROCESS 

-An ideal isothermal process must occur very slowly to keep the gas temperature constant. An ideal adiabatic process must occur very rapidly without any flow of energy in or out of the system. In practice most expansion and compression processes are somewhere in between, or said to be polytropic.

ADABATIC PROCESS

-An adiabatic process is one in which no heat is gained or lost by the system. The first law of thermodynamics with Q=0 shows that all the change in internal energy is in the form of work done. This puts a constraint on the heat engine process leading to the adiabatic conditionshown below. This condition can be used to derive the expression for the work done during an adiabatic process.

(VIDEO FOR THIS TOPIC)

 part 1: Work and isobaric processes 

part 2: Isothermal, isometric, adiabatic processes

MUHAMMAD NURAMMAR BIN AZAMEE

(13DEM18F1025)