Mechanical Engineering - Thermodynamics - Discussion


The isothermal and adiabatic processes are regarded as

[A]. reversible process
[B]. irreversible process
[C]. reversible or irreversible process
[D]. none of these

Answer: Option A


No answer description available for this question.

Gaurav said: (Apr 17, 2015)  
Adiabatic could be irreversible also.

Vinoth said: (Sep 5, 2015)  
If it is adiabatic process means, then there will be no heat loss. So no loss means it must be reversible process.

Shiva said: (Sep 16, 2015)  
Isothermal and adiabatic are common names.

A reversible isothermal process is called Hyperbolic process.

A reversible adiabatic process is called iso-entropic process.

Option C may be correct.

Venkat said: (Aug 10, 2016)  
Option C is the correct one.

Devmallya said: (Aug 26, 2016)  
If you have an adiabatic reversible path that takes you from state 1 to state 2, any irreversible path from state 1 to state 2 will require removal of heat, so it won't be adiabatic. This is a consequence of the 2nd law of thermodynamics, captured by the Clausius Inequality.

Debashis said: (Apr 14, 2018)  
Reversible process: isothermal, adiabatic, Carnot, Starling, Ericson.

Irreversible: entropy increase, Cp, Cv, PVn.

Srikar said: (Jun 14, 2018)  
There will be both reversible and irreversible adabatic process.

Joe said: (Jul 11, 2018)  
For option A to be correct, they might have meant a process which is isothermal and adiabatic.

In that case, that process will be reversible since no heat exchange and no internal temperature changes (no dissipative effects).

Fasil said: (Aug 25, 2020)  
I think you are correct @Joe.

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