How many kilojoules of energy are released from the carbon carbon single bonds when glucose (C6H12O6) is burned???

Question

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Answer 1

In a six-carbon chain, there are 5 C-C bonds. When those bonds break during combustion, energy is absorbed, not released.
The energy released is due to the formation of C=O bonds in CO2 and H-O bonds in H2O.
Calculating the NET energy released must take into account the energy absorbed for breaking bonds and energy released by the formation of new bonds.