Entropy - time's arrow from definition of system in thermodynamics Watch Video
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Description: Entropy is a rather enigmatic physical quantity. Its definition, not required in the IB syllabus, is tantilisingly simple - the ratio of Thermal energy change per absolute temperature (Q/T) measured in J/K. In this video entropy is defined as a measure of disorder. In a thermodynamic system the billions of particle involved may be arranged in billions of different ways - perhaps in a range of energy levels. Only very few of these particle arrangements may be considered as ordered. For example, i
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