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Writing Balanced Equations

Posted: Thu Feb 02, 2017 9:20 am
by Kelsey Jug 1J
When writing balanced equations in order to calculate Gibbs free energy from the Gibbs free energy of formation of the products and reactants, how do we know whether to use full integers to balance equations or fractions.

For example, on problem 9.59, 2 Fe3O4 (s) + O2 (g) ---> 3 Fe2O3 was balanced to be 2 Fe3O4 (s) + 1/2 O2 (g) ---> 3 Fe2O3 rather than 4 Fe3O4 (s) + O2 (g) ---> 6 Fe2O3. How do we know which way to balance equations?

Re: Writing Balanced Equations

Posted: Thu Feb 02, 2017 3:28 pm
by Catherine_L_1C
Hi,
Either way it shouldn't matter, because I believe Gibbs free energy is measured in J/mol, so as long as you end up solving for the value per 1 mol, you should be fine.

Hope this helped!