1. H2 (g) + 12 O2 (g) → H2O(g) AH =- 242 kJ mol-'. Bond energy of H, and O2 are 436 kJ
moland 500 kJ mol-' respectively. What is bond energy of O-H bond.
Answers
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Answer:
H
2
(g)+
2
1
O
2
(g)⟶H
2
O(g); ΔH=−242 kJ mol
−1
ΔH= Bond energy of reactants− Bond energy of products
ΔH=B
H−H
+
2
1
B
O−O
−2B
O−H
;
−242 kJ=436+
2
1
(500)−2B
O−H
−928 kJ=−2B
O−H
⇒B
O−H
=
2
928
=464 kJ mol
−1
Explanation:
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