Which of the following processes has a delta S > 0 a. CH_3 OH (l) rightarrow CH3

Question

Which of the following processes has a delta S > 0 a. CH_3 OH (l) rightarrow CH3OH (s) b. N_2 (g) + 3H_2 (g) rightarrow 2NH3 (g) c. CH4(g) + H2O(g) rightarrow CO(g) + 3H2(g) d. All of the above Consider the saturated solutions of the following compounds and their concentration of solubility product constants. Which solutions would have the smallest concentration of F-ions? a. CaF2 Ksp = 3.9 times 10-11 b. SrF2 Ksp = 7.9 times 10-10 c. MgF2 Ksp = 3.7 times 10-8 d. BaF2 Ksp = 3.90 times 10-6 In this reaction: NH3(aq) + H2O(aq) rightarrow leftarrow NH4+(aq) + OH-(aq) a. NH3 acts as a base and OH- acts as an acid b. H2O acts as an acid and OH- acts as a base c. H2O acts as a base and NH4+ acts as an acid d. H2O acts as an acid and NH4+ acts as a base 1. Which of the following process would lead to a decrease in entropy? a. Hg (s) rightarrow Hg (l) b. 2 SO3 (g) rightarrow 2 SO2 (g) + O2 (g) c. 4 Fe (s) + 3 O2 (g) rightarrow 2 FeO3 (s) d. C2H4 (g) rightarrow C2H2

Explanation / Answer

1. C

There are two molecules of reactants and four molecules of product. Therefore, there is increase in entropy i.e. an increase in disorder because the number of gas molecules are increasing.

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