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(B) $(a) H_{2(g)} \longrightarrow 2H_{(g)}: \Delta n_g > 0$, so $\Delta S > 0$. $(b) H_2O_{(l)} \longrightarrow H_2O_{(s)}:$ The degree of randomness

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Liquid water crystallizes to ice

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(B) $(a) H_{2(g)} \longrightarrow 2H_{(g)}: \Delta n_g > 0$, so $\Delta S > 0$. $(b) H_2O_{(l)} \longrightarrow H_2O_{(s)}:$ The degree of randomness of $H_2O$ molecules decreases during the freezing of water into ice, so $\Delta S $(c)$ With an increase in temperature, the kinetic energy $(KE)$ of $H_2O$ molecules in ice increases, so $\Delta S > 0$. $(d) 2NaHCO_{3(s)} \longrightarrow Na_2CO_{3(s)} + CO_{2(g)} + H_2O_{(g)}:$ Here, $\Delta n_g > 0$, so $\Delta S > 0$. Therefore, entropy decreases when liquid water crystallizes into ice.

In which of the following processes does the entropy decrease?

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