to calculate the true enthalpies of these reactions by the Hess’ law, as: ΔH°(rxn) = Σ[ν × ΔHf°(product)] – Σ[ν × ΔHf°(reactant)] for: Mg(s) + ½O2(g) → MgO(s)

Q: A scientist measures the standard enthalpy change for the following reaction to be 79.4 kJ:…

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Q: A scientist measures the standard enthalpy change for the following reaction to be 5.4 kJ : Fe(s) +…

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Q: Use standard enthalpies of formation to calculate ΔH∘rxnΔHrxn∘ for the following reaction:…

A: ∆fH°(C,s) = 0    ∆fH° (H2,g) = 0  ∆fH° (H2O,g) = -241.8 KJ/mole  ∆fH° (CO,g) = -110.5 KJ/mole

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