1 Estimate H for the reaction using bond dissociationenergies Give ...

1 Let us first make a simple table Bond type No of bond Bond e ....

#1. Estimate Î”H for the reaction using bond dissociation energies. Give your answer in kcal. C6H12O6...

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#1. Estimate Î”H for the reaction using bond dissociationenergies. Give your answer in kcal. C6H12O6 has five Câˆ’C bonds,seven Câˆ’H bonds, seven Câˆ’O bonds, and five Oâˆ’H bonds.
#2. Is the reaction exothermic or endothermic?
#3. The following equation shows the conversion of aluminumoxide (from the ore bauxite) to aluminum:
2Al2O3(s)â†’4Al(s)+3O2(g),Â Â
Î”H = +801.0 kcal
----> a. Is the reactionexothermic or endothermic?

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#1 Let us first make a simple table,

Bond typeÂ Â No. of bondÂ Â Â Bond energy(kJ/mol)Â Â total bond energy(kJ/mol)Â Â Â

C-CÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 5Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 347Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1735Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â

Â Â O-HÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 5Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 464Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 2320

Â Â C-HÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 7Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 414Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 2898

C-OÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 5Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 358Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1790

C=OÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 803Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 803

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Total Bond Energy for Glucose = 9546 kJ/mol = 2281.55 kcal/mol

#3 The given reaction is endothermic. deltaH is +ve, means heat is taken up by the reaction.

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#1. Estimate Î”H for the reaction using bond dissociation energies. Give your answer in kcal. C6H12O6...

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