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Give example in which the entropy of a system decrease and explain why the second law of thermodynamics is not violated.

Give example in which the entropy of a system decrease and explain why the second law of thermodynamics is not violated.

Grade:11

1 Answers

Aditi Chauhan
askIITians Faculty 396 Points
8 years ago
The disorder of an isolated system never decreases. Entropy is often associated with disorder and the second law of thermodynamics is sometimes cast as a statement that the disorder of a closed system always increases. Energy is a conserved quantity, while entropy is a quantity that can and generally does increase. In accordance to the law of entropy, the entropy of a thermally isolated system of objects never decreases.
Turning your home’s thermal energy into electric energy would reduce its disorder and decrease its entropy. Like all heat pumps, an air conditioner transfers heat and entropy in such a way that the law of entropy is never violated and the entropy of each thermally isolated system of objects never decreases. As we will see, the air conditioner lowers the entropy of your home but raises the entropy of the outdoor air even more so that, overall, the entropy of the world actually increases. That is why the second law of thermodynamics is not violated

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