How do you have free energy in living organisms if free energy is not possible?

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C6H12O6 + 6O2 =====> 6CO2 + 6H2O + Free energy
This is a biophysics question, so I did categorize it appropriately.
Henkz0rxz5000, how does that not violate the law of conservation of energy and the 2nd law of thermodynamics?

Best reply by Henkz0rxz5000:

The free energy is used to bind phosphate groups to adenosin. Three phosphate groups bound to adenosin creates ATP, the cells energy currency

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How do you have free energy in living organisms if free energy is not possible?

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One Response to How do you have free energy in living organisms if free energy is not possible?

  1. Because energy is conserved. The chemical bonds in a glucose molecule are at a higher energy level than those in CO2 and H2O, and because energy must be conserved, that allows us to do work along a biochemical pathway. Cells use that work t(o assemble ATP, which can be broken down by proteins to do anything that requires an energy input.

    This is completely in line with the 2nd law. Just the fact that we are turning one mole of solid into at least 6 (depending on how you count water) moles of gas gives an enormous entropy increase without even considering anything else. Since we are not extracting all the energy as work (the leftovers become body heat), it’s good.

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