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Estimate the Minimum Temperature at Which Magnetite Can Be Reduced \rightarrow

Question 141

Multiple Choice

Estimate the minimum temperature at which magnetite can be reduced to iron by graphite.
Fe3O4(s) + 2C(s) \rightarrow 2CO2(g) + 3Fe(s)
Δ\Delta Sr ο\omicron = +351.44 kJ.mol-1
The standard molar enthalpies of formation of magnetite and CO2(g)
Are -1118.4 and -393.51 kJ.mol-1 ,Respectively.


A) 670 ο\omicron C
B) Magnetite cannot be reduced by carbon at any temperature.
C) 787 ο\omicron C
D) 943 ο\omicron C
E) 1790 ο\omicron C

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