Entropy is a measure of the amount of
randomness or disorder in a system. In
chemical reactions and molecular processes,
spontaneous progress is always made in a direction
which will increase the total state of disorder;
as an analogy, throwing a bundle of confetti in
the air will result in many isolated pieces
scattered all over the ground, not the single
bundle from which the pieces originated.
In another example, the entropy of an
unburned piece of wood and its surroundings is
lower than the entropy of the ashes, burnt
remains, and warmed surroundings due to burning of
that piece of wood. For parents, the concept of
entropy is easy to understand, because children
inevitably increase entropy, while parents
struggle to reduce it.
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