When a system is considered in two different states, the difference in volume or in any other property, between the two states, depends solely upon those sta...

When a system is considered in two different states, the difference in volume or in any other property, between the two states, depends solely upon those states themselves and not upon the manner in which the system may pass from one state to the other.

quote by Rudolf Arnheim
Submitted by Lucian Velea
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