A change in the state of a system during its interaction with surroundings is called a thermodynamic process
Constant Volume Process:
Constant volume process in this volume remains constant, work done is equal to zero. The constant volume process is also known as a Isochoric process.
Constant Pressure Process:
Constant pressure process in this process pressure is remaining constant. The heat energy is supplied is equal to change in enthalpy.
The constant pressure process is also known as isobaric process.
Isothermal Process is a constant temperature process, change in internal energy and change in enthalpy is also zero. It is a hyperbolic process.
In this adiabatic process no heat energy is transferred into or from the system is called adiabatic process and it is known as isentropic process.
In this polytrophic process work and energy both are transferred are across the boundary.
In this throttling process Heat transfer and work done transfer is zero. The throttling process is occurred in opened valves and small orifices.
Free expansion Process:
Free expansion process no work is performed by the system and no heat transferred into or from the system.