Consider the reaction:
4 NH₃(g) + 5 O₂(g) → 4 NO₂(g) + 6 H₂O(l)
ΔH°f -46.19 0.00 90.37 -285.85 kJ/mol
Compute ΔH° for this reaction.

Name: Consider the reaction: &emsp; &emsp; 4 NH 3 (g) + 5 O 2 (g) → 4 NO 2 (g) + 6 H 2 O(l) ΔH°f -46.19 &emsp; &emsp; 0.00 &emsp; &emsp; 90.37 &emsp; &emsp; -285.85 kJ/mol Compute ΔH° for this reaction.
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Question

Consider the reaction: 4 NH₃(g) + 5 O₂(g) → 4 NO₂(g) + 6 H₂O(l) ΔH°f -46.19 0.00 90.37 -285.85 kJ/mol Compute ΔH° for this reaction.

Quizplus · Accepted Answer

ΔH°rxn = ΣΔH°f(products) - ΣΔH°f(reactants)
= [4(90.37 kJ/mol) + 6(-285.85 kJ/mol)] - [4(-46.19 kJ/mol) + 5(0.00 kJ/mol)]
= -1168.9 kJ/mol
Therefore, the answer choice is C.

Consider the Reaction