predict in which of the following entropy decrease

  1. a liquid crystallizes into a solid.
  2. H2(g) --->2H(g)

1. The entropy decreases when a liquid changes into a solid because liquids are more disordered than solids.

2. In this reaction, the number of moles of gas increases from 1 to 2.Therefore, entropy increases.

Hence entropy decreases in reaction 1

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