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WHAT ARE State functions PLEASE DESCRIBE IN DETAIL

WHAT  ARE State functions PLEASE  DESCRIBE IN DETAIL

Grade:12

1 Answers

Gayatri Jayesh Bondriya
521 Points
8 years ago
State functions and exact differentials
We saw in Section 2.2 that a ‘state function’ is a property that is independent of how a
sample is prepared. In general, such properties are functions of variables that define
the current state of the system, such as pressure and temperature. The internal energy
and enthalpy are examples of state functions, for they depend on the current state of
the system and are independent of its previous history. Processes that describe the
preparation of the state are called path functions. Examples of path functions are the
work and heating that are done when preparing a state. We do not speak of a system
in a particular state as possessing work or heat. In each case, the energy transferred as
work or heat relates to the path being taken between states, not the current state itself.
We can use the mathematical properties of state functions to draw far-reaching
conclusions about the relations between physical properties and establish connections
that may be completely unexpected. The practical importance of these results is
that we can combine measurements of different properties to obtain the value of a
property we require

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