In which of the following thermodynamical process, temperature remains constant?
Isochoric
Isobaric
Isothermal
Adiabatic
Isothermal Process
Here the temperature is kept constant during each step of the process. Example,
It is achieved by using a thermostatic control.
Heat can be absorbed or evolved here that is, can be exchanged with the surroundings. Example, Freezing, melting, evaporation, condensation.
In the isothermal process, T=constant
Hence, the option number (3) is correct.