SYSTEM
A system is defined as a region in space containing a specific amount of matter whose behavior is being observed .
The system is separated from surrounding by its boundary . The boundary may be real one or imaginary surface .
The boundary may be in rest or in motion and can change his shape and size .The term surrounding is restricted to those portion of the matter external to the system in which is thermodynamics affected by the changes occurring within in the system.
TYPES OF SYSTEMS
1. OPEN SYSTEM
It is the region in space defined by boundary across in which matter is flow in the form of heat and work .
EXAMPLE OF OPEN SYSTEM
- Water entering boilers and leaves as a stream
- Gases flowing through turbines
- Gas expending from pressurized container through a nozzle .
2 . CLOSED SYSTEM
It is a system in which no mass crosses the boundary . that is quantity of matter within the system remain fixed . But energy is allow to cross the boundary in the form of heat and work .
EXAMPLE OF CLOSED SYSTEM
- Gas expending in a piston cylinder
- mixture of water and stream in closed vessel
3 . ISOLATED SYSTEM
A system is termed as isolated if neither matter or energy is allow to transfer to across the boundary .
EXAMPLE OF ISOLATED SYSTEM
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