Iron compounds thermodynamic properties

From the above it is likely that sulfate is reduced before ferric iron. This is contrary to what one would expect from the thermodynamic properties of Fe(III) compounds and sulfates. This may be caused by... 

Parker VB, Khodakovskii IL (1995) Thermodynamic properties of the aqueous ions (2- - and 3 -b) of iron and the key compounds of iron. J Phys Chem Refer Data 24 1699-1745... 

A Why does Al203(s) have a lower entropy than Fe203(s) There are two primary qualitative reasons for this. You may have to use the chemistry library or some other source to get more information on the properties of these two common compounds to answer the question. Steel is made by the high-temperature reaction of iron oxide (Fe203) with coke (a form of carbon) to produce metallic iron and CO2. This same reaction can NOT be done with alumina (AI2O3) and carbon to make metallic A1 and CO2. WTiy not Explain fully and give thermodynamic reasons for your answer. You may need to obtain further information from outside sources on the properties of the substances involved. 

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