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Entropy of the system decreases, when

A. Snow melts into water

B. A gas expands spontaneously from high pressure to low pressure

C. Water is converted into ice

D. Both (B) & (C)

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  2. Which of the following processes cannot be made reversible even under ideal condition of operation?
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  13. 4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is
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