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Calculate the heat of reaction (ΔHrxn) for the following reactions, using heats of formation (ΔHf). Show your work. Refer to a table of heats of formation in your textbook as needed.

5O2(g) + 4NH3(g) → 6H2O(g) + 4NO(g)

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dHrxn = (n*dHf products) - (n*dHf reactants)

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