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4. Use data from the table of thermochemical data (Appendix C) to calculate Delta G Standard...

4. Use data from the table of thermochemical data (Appendix C) to calculate Delta G Standard for the reactions shown.

A. 2Fe2O3(s) >> 4Fe(s) + 3O2(g)

B. 2PCl3(g) + O2(g) >>2POCl3(g)

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Answer #1

A)

we have:

Gof(Fe2O3(s)) = -742.2 KJ/mol

Gof(Fe(s)) = 0.0 KJ/mol

Gof(O2(g)) = 0.0 KJ/mol

we have the Balanced chemical equation as:

2 Fe2O3(s) ---> 4 Fe(s) + 3 O2(g)

deltaGo rxn = 4*Gof(Fe(s)) + 3*Gof(O2(g)) - 2*Gof( Fe2O3(s))

deltaGo rxn = 4*Gof(Fe(s)) + 3*Gof(O2(g)) - 2*Gof( Fe2O3(s))

deltaGo rxn = 4*(0.0) + 3*(0.0) - 2*(-742.2)

deltaGo rxn = 1484 KJ/mol

Answer: 1484 KJ/mol

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