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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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cloveb cloveb
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7 years ago
What energy change is associated with the reaction to obtain 1.00 mole of H2? The balanced equation is:
2 H2O(g) → 2 H2(g) + O2(g)
and the relevant bond energies are:
H-H : 436 kJ/mol; H-O : 467 kJ/mol;
O-O : 146 kJ/mol; O=O : 498 kJ/mol.

1. +425 kJ
2. +249 kJ
3. −425 kJ
4. +498 kJ
5. -498 kJ
6. −436 kJ
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bolbolbolbol
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7 years ago
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