Consider Splitting Water into Hydrogen and Oxygen Gas and Its

question 9

Multiple Choice

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) 1.75×10³ K

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