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Consider Splitting Water into Hydrogen and Oxygen Gas and Its

Question 69

Multiple Choice

Consider splitting water into hydrogen and oxygen gas and its corresponding thermodynamic data as shown below:
2 H₂ O ( Consider splitting water into hydrogen and oxygen gas and its corresponding thermodynamic data as shown below: 2 H₂ O (   )  2 H₂ (g)  + O₂(g)  D S rxn = 326 J/mol K and D H rxn = 572 kJ/mol At what approximate temperature does this reaction cross-over from being considered non-spontaneous to being spontaneous? A)  It won't cross over. It is spontaneous at all temperatures. B)  It won't cross over. It is non-spontaneous at all temperatures. C)  186 K D)  570 K E)  1.75×10<sup>3</sup> K ) 2 H₂ (g) + O₂(g) D S rxn = 326 J/mol K and D H rxn = 572 kJ/mol At what approximate temperature does this reaction cross-over from being considered non-spontaneous to being spontaneous?


A) It won't cross over. It is spontaneous at all temperatures.
B) It won't cross over. It is non-spontaneous at all temperatures.
C) 186 K
D) 570 K
E) 1.75×103 K

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