answer the next two questions? of Barium oxide with carbon dioxide to form Bariu

Question

answer the next two questions? of Barium oxide with carbon dioxide to form Barium Carbonate as shown below to Ba0 (s) + Baco, (s) ?".--174 J/mol-K and ??'m--277 klínol co, (g)-, Which statement below is true? 9 1. This reaction is spontaneous at all temperatures. S. This reaction is spntaeous at rlatively lower temperatures and noa-spontancous at higher 4. This reaction is spontaneous at relatively higher temperatures and non-spontaneous at lower 2. This reaction is non-spontaneous at all temperatures. temperatures temperatures 5. There is not enough information to make an assessment. 10, what is the standard molar Gibbs Free Energy, ??? for this reaction at 500 K? 1. 0%.--365 Kinnol 4. ???.--190 KJ/mol 2. AG'--313KJ/mol 5. AG..-35 KJ/mol (I. Consider the following reaction and its coresponding thermodynamic data. NH, (8)+ HCI(s) NHCI() AH -175.9 kJ/mol and AS -284.6 J/mol K At what approximate temperature does this reaction cross over from being considered spontaneous to being non-spontaneous? 1. It won't cross over. It will always be spontaneous. 2. It won't cross over. It will always be non-spontaneous 3. 50.1 K 4. 618 K 5. 1618 K 2, Which substances listed below would be expected to have a standard molar Gibbs Free-Energy of formation equal to zero, ??,-0? a) Na (aq) 1. a only 2. b only 3. conly b) 02 (8) c) HO (1) 4. a and b 5. All of the above

Explanation / Answer

Ans 9 and ans 10

Standard molar Gibbs free energy

G°rxn = H - TS

= - 277 kJ/mol - [500 K x ( - 174 J/mol·K) x 1kJ/1000 J]

= - 277 + 87

= - 190 kJ/mol

Ans 10 - Option 4 is the correct answer

G < 0

H < 0

S < 0

The reaction is spontaneous at relatively lower temperatures and non spontaneous at higher temperatures.

Ans 9 - option 3 is the correct answer

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