QuestionMay 6, 2025

Which of the following processes have a Delta S that is negative? Select all that apply Al(s)arrow Al(l) 2N_(2)O_(5)(g)arrow 4NO_(2)(g)+O_(2)(g) H_(2)O(l)arrow H_(2)O(s) CO_(2)(s)arrow CO_(2)(g) N_(2)(g)arrow N_(2)(l)

Which of the following processes have a Delta S that is negative? Select all that apply Al(s)arrow Al(l) 2N_(2)O_(5)(g)arrow 4NO_(2)(g)+O_(2)(g) H_(2)O(l)arrow H_(2)O(s) CO_(2)(s)arrow CO_(2)(g) N_(2)(g)arrow N_(2)(l)
Which of the following processes have a Delta S that is negative? Select all that apply Al(s)arrow Al(l) 2N_(2)O_(5)(g)arrow 4NO_(2)(g)+O_(2)(g) H_(2)O(l)arrow H_(2)O(s) CO_(2)(s)arrow CO_(2)(g) N_(2)(g)arrow N_(2)(l)

Solution
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Answer

H_{2}O(l)\rightarrow H_{2}O(s), N_{2}(g)\rightarrow N_{2}(l) Explanation 1. Identify Phase Changes For Al(s)\rightarrow Al(l) and N_{2}(g)\rightarrow N_{2}(l), the processes involve melting and condensation, respectively. Melting increases entropy, while condensation decreases it. 2. Analyze Reaction Stoichiometry For 2N_{2}O_{5}(g)\rightarrow 4NO_{2}(g)+O_{2}(g), the number of gas molecules increases from 2 to 5, indicating an increase in entropy. 3. Consider Solid-Liquid-Gas Transitions For H_{2}O(l)\rightarrow H_{2}O(s), freezing occurs, which decreases entropy. For CO_{2}(s)\rightarrow CO_{2}(g), sublimation occurs, which increases entropy.

Explanation

1. Identify Phase Changes<br /> For $Al(s)\rightarrow Al(l)$ and $N_{2}(g)\rightarrow N_{2}(l)$, the processes involve melting and condensation, respectively. Melting increases entropy, while condensation decreases it.<br /><br />2. Analyze Reaction Stoichiometry<br /> For $2N_{2}O_{5}(g)\rightarrow 4NO_{2}(g)+O_{2}(g)$, the number of gas molecules increases from 2 to 5, indicating an increase in entropy.<br /><br />3. Consider Solid-Liquid-Gas Transitions<br /> For $H_{2}O(l)\rightarrow H_{2}O(s)$, freezing occurs, which decreases entropy. For $CO_{2}(s)\rightarrow CO_{2}(g)$, sublimation occurs, which increases entropy.
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