In photosynthesis, green plants convert carbon dioxide and water into glucose (C6H12O6)according to the following equation:
6CO₂(g)+6H₂O(l)→C₆H₁₂O₆(aq)+6O₂(g)

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.