Question

An isolated system in equilibrium will be found with equal probability in each of its accessible micraotates

Answer 1

Isolated system

Physical systems that don't interact with other parts of the universe

In physical science, an isolated system is either of the following:

a physical system so far removed from other systems that it does not interact with them.

a thermodynamic system enclosed by rigid immovable walls through which neither mass nor energy can pass.

See also: Thermodynamic system

Properties of Isolated, closed, and open systems in exchanging energy and matter.

Though subject internally to its own gravity, an isolated system is usually taken to be outside the reach of external gravitational and other long-range forces.

This can be contrasted with what (in the more common terminology used in thermodynamics) is called a closed system, being enclosed by selective walls through which energy can pass as heat or work, but not mass of substance; and with an open system, which both mass and energy can enter or exit, though it may have variously impermeable walls in parts of its boundaries.

An isolated system obeys the conservation law that its total energy–mass stays constant. Most often, in thermodynamics, mass and energy are treated as separately conserved.

Because of the requirement of enclosure, and the near ubiquity of gravity, strictly and ideally isolated systems do not actually occur in experiments or in nature. Though very useful, they are strictly hypothetical.

Classical thermodynamics is usually presented as postulating the existence of isolated systems. It is also usually presented as the fruit of experience. Obviously, no experience has been reported of an ideally isolated system.

It is, however, the fruit of experience that some physical systems, including isolated ones, do seem to reach their own states of internal thermodynamic equilibrium. Classical thermodynamics postulates the existence of systems in their own states of internal thermodynamic equilibrium. This postulate is a very useful idealization.

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