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Part of the universe under investigation.
A system which can exchange both energy and matter with its surroundings.
A system which permits passage of energy but not mass, across its boundary.
A system which can neither exchange energy nor matter with its surrounding.
Part of the universe other than system, which can interact with it.
Anything which separates system from surrounding.
The variables which are required to be defined in order to define state of any system i.e. pressure, volume, mass, temperature, surface area, etc.
Property of system which depend only on the state of the system and not on the path.
Example: Pressure, volume, temperature, internal energy, enthalpy, entropy etc.
Properties of a system which do not depend on mass of the system i.e. Temperature, pressure, density, concentration,
Properties of a system which depend on mass of the system i.e. Volume, energy, enthalpy, entropy etc.
Path along which state of a system changes.
Process which takes place at constant temperature
Process which takes place at constant pressure
Process which takes place at constant volume.
Process during which transfer of heat cannot take place between system and surrounding.
Process in which system comes back to its initial state after undergoing series of changes.
Process during which the system always departs infinitesimally from the state of equilibrium i.e. its direction can be reversed at any moment.