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Question
In which of the following cases entropy decreases?
In which of the following cases entropy decreases?
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Solution
The correct option is B Polymerisation
Sometimes it is hard to follow the heat, but it is easy to decide if the disorder increases or decreases. The entropy increases whenever heat flows from a hot object to a cold object. It increases when the ice melts, water is heated, water boils, water evaporates. Solids change to liquid, expansion of gas and dissolution of crystal are examples of increasing disorders or increasing entropy.
In Polymerization the number of molecules present is decreasing, so the randomness or entropy also decreases.
Hence, option D is correct.
Sometimes it is hard to follow the heat, but it is easy to decide if the disorder increases or decreases. The entropy increases whenever heat flows from a hot object to a cold object.
It increases when the ice melts, water is heated, water boils, water evaporates. Solids change to liquid, expansion of gas and dissolution of crystal are examples of increasing disorders or increasing entropy.
In Polymerization the number of molecules present is decreasing, so the randomness or entropy also decreases.
Hence, option D is correct.
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