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

#1. Estimate ΔH for the reaction using bond dissociation energies. Give your answer in kcal. C6H12O6 has five C−C bonds, seven C−H bonds, seven C−O bonds, and five O−H bonds.

#2. Is the reaction exothermic or endothermic?

#3. The following equation shows the conversion of aluminum oxide (from the ore bauxite) to aluminum:
2Al2O3(s)→4Al(s)+3O2(g),
ΔH = +801.0 kcal

----> a. Is the reaction exothermic or endothermic?

Expert Solution

#1 Let us first make a simple table,

Bond type No. of bond Bond energy(kJ/mol) total bond energy(kJ/mol)

C-C 5 347 1735

O-H 5 464 2320

C-H 7 414 2898

C-O 5 358 1790

C=O 1 803 803

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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.

queen_honey_blossom answered 4 months ago

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The table below lists the average bond energies that you would need to determine reaction enthalpies

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