Find, using Hess's law, the overall enthalpy change of the reaction below. Determine whether the reaction is endothermic or exothermic. 2N2 + 5O2 → 2N2O5 Refer to the following reactions. 1) 2H2O → O2 + 2H2 ∆H= +572 kJ 2) N2O5 + H2O → 2HNO3 ∆H= -78 kJ 3) N2 + 3O2 + H2 → 2HNO3 ∆H= -349 kJ

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Chapter1: Chemical Foundations
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Find, using Hess's law, the overall enthalpy change of the reaction below. Determine whether the reaction is endothermic or exothermic.

2N2 + 5O2 → 2N2O5

Refer to the following reactions.

1) 2H2O → O2 + 2H2 ∆H= +572 kJ

2) N2O5 + H2O → 2HNO3 ∆H= -78 kJ

3) N2 + 3O2 + H2 → 2HNO3 ∆H= -349 kJ

 

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