What are open, closed and isolated systems ? Give one example for each.

Explanation

A. Type of systems : Basing on the fact that wheather energy or matter or both are exchanging between the system and the surroundings the system are classified into three types a) open system b) closed system c) isolated system.
a) Open System : A system which can exchange both matter and energy with its surroundings is called an open system.
Ex : A liquid in an open vessel. It can absorb heat energy from the surroundings and can give heat energy to the surroundings during evaporation and condensation. Similarly water can go as vapour into the surroundings and vapour can condense as liquid into the beaker.
b) Closed system : A system which can exchange energy but not matter with its surroundings is called closed system.
Ex : Water taken in a closed non porous vessel. This can take heat from the surroundings and is evaporated. The vapour can condense back into liquid realising heat to the surroundings. But water cannot leave or enter the vessel because it is closed.
C. Isolated system : A system in which neither matter nor energy is exchanged with surroundings.
Ex : Liquid taken in a closed thermos flask. Heat can neither enter nor leave the flask . Similarly liquid or its vapour cannot go into the surroundings.