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Chapter: 11th Chemistry : UNIT 7 : Thermodynamics

Thermodynamics State functions, path functions

A thermodynamic system can be defined by using the variables P, V, T and `n'.

State functions, path functions:

 

State function

 

A thermodynamic system can be defined by using the variables P, V, T and `n'. A state function is a thermodynamic property of a system, which has a specific value for a given state and does not depend on the path (or manner) by which the particular state is reached.

Example : Pressure (P), Volume (V), Temperature(T), Internal energy (U), Enthalpy (H), free energy (G) etc.

 

Path functions:

 

A path function is a thermodynamic property of the system whose value depends on the path by which the system changes from its initial to final states.

 

Example: Work (w), Heat (q).

 

Work (w) will have different values if the process is carried out reversibly or irreversibly.

 


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11th Chemistry : UNIT 7 : Thermodynamics : Thermodynamics State functions, path functions |

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11th Chemistry : UNIT 7 : Thermodynamics


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