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What is the enthalpy of the following reaction as written (Include a + or -as part of your answer. Do not put a space between the sign and your answer.)

4 \mathrm{Fe}_{3} \mathrm{O}_{4}(\mathrm{~s})+\mathrm{O}_{2}(\mathrm{~g})->6 \mathrm{Fe}_{2} \mathrm{O}_{3}(\mathrm{~s})

Fig: 1

Fig: 2