for this to happen
the reactants must be elements in their standard state cause the free energy for elements in their standard states is zero
so
now
free energy change of reaction = free energy of prodocuts - free energy of reactants
free energy change of reaction = free energy of glucose - 0
free energy change of reaction = free energy of glucose
also one mole of glucose must be formed
the standard states are
Carbon --> C(s)
hydrogen ---> H2 (g)
oxygen ---> O2 (g)
so the chemical reaction is
6C(s) + 6 H2 (g) + 3O2 (g) --> C6H12O6 (s)
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