Physics XI Content
A thermodynamic system is a collection of matter which has distinct boundaries.
A real or imaginary portion of universe which has distinct boundaries is called system.OR
A thermodynamic system is that part of universe which is under thermodynamic study.
| FOR EXAMPLE:|
A BALLON FILLED WITH AIR
A BEAKER FILLED WITH WATER
TYPES OF SYSTEM
|There are three types of thermodynamic systems.|
| An open system is one in which both mass & energy transfer takes place across the boundaries.|
| A closed system in which there is no transfer of mass takes place across the boundaries of system but energy transfer is possible.|
| An isolated system is that in which there is no transfer of mass & energy takes place across the boundaries of system.|
A thermo flask containing hot or cold liquid.
|All the properties of a system in bulk which are easily measurable are known as macroscopic properties.|
TYPES OF MACROSCOPIC PROPERTIES
| Macroscopic properties can be divided into two main classes.|
| Macroscopic properties of a system which are independent of mass are known as intensive properties. whatever is the mass but properties remain unchanged.|
FOR EXAMPLE: MELTING POINT, BOILING POINT, DENSITY, TEMPRATURE, PRESSURE, VISCOSITY.
| Macroscopic properties of a system which are strictly dependent on their mass or quantity of matter are known as extensive properties.|
If mass is halved the property will also be half.
FOR EXAMPLE: volume, mole, mass, enthalpy, internal energy, kinetic energy.