Isothermal - Same temperature in the initial state and final state
T1 = T and T2 = T and T1 = T2
Adiabatic - No energy transfer
The operation by which a system changes from one state to another is called a process. Whenever a system changes from one state to another it is accompanied by change in energy. In the case of open systems, there may be change of matter as well.
Isothermal process:
A process said to be isothermal if the temperature of the system remains constant during each stage of the process.
Adiabatic process:
A process is said to be adiabatic if no heat enters or leaves the system during any step of the process.
Isobaric - Same pressure in the initial state and final state
Isochoric - Same volume at before reaction and after reaction.
Isobaric process:
A process is said to be isobaric if the pressure of the system remains constant during each step of the process.
Isochoric process:
An isochoric process is a thermodynamic process in which the volume remains constant. Since the volume is constant, the system does no work and W = 0.
Reversible and Irreversible Process:
A process carried out infinitesimally slowly so that the driving force is only infinitesimally greater than the opposing force, is called a reversible process.
Any process which does not take place in the above manner, i.e., a process which does not take place infinitesimally slowly, is said to be an irreversible process.