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March 27, 2017

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Consider the following reaction:

2Fe2O3 --> 4Fe + 3O2

∆Hrxn° = +824.2 kJ

The decomposition of 29.0 g of Fe2O3 results in

a. the release of 150 kJ of heat
b. the release of 12000 kJ of heat
c. the absorption of 12000 kJ of heat
d. the absorption of 150 kJ of heat
e. the absorption of 74.8 kJ of heat
f. the release of 74.8 kJ of heat

  • Chemistry - ,

    824.2 kJ x (29.0/2*molar mass Fe2O3) = ?+kJ energy.

    The sign of dH is +; therefore, it must be an absorption of energy. Calculate how much. It should be one of c,d,or e.

  • Chemistry - ,

    Thank you DrBob222

  • Chemistry - ,

    34.7Kj

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