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Entropy has sometimes been described as "time's arrow" because it is the property that determines the forward direction of time. Explain.
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Entropy, like time, only moves in one direction: it always increases. Therefore, the entropy of the universe for previous states is always lower than that for later states. If entropy didn't increase, then the universe would be static and time would not passing by.
Entropy, Free Energy, and Equilibrium
University of Central Florida
University of Toronto
In thermodynamics, the zeroth law of thermodynamics states that if two systems are in thermal equilibrium with a third system, they are also in thermal equilibrium with each other.
A spontaneous process is one in which the total entropy of the universe increases. In a spontaneous process, the system will move from an ordered state to a disordered state, such as from ice to water, or from a solid to a gas. The concept of spontaneity was introduced by Rudolf Clausius in 1850.
Entropy has been described…
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