Determine Δ_rH° for the Following Reaction,2 NH₃(g)+ 5/2 O₂(g)→ 2

Multiple Choice

Determine Δ_rH° for the following reaction,2 NH₃(g) + 5/2 O₂(g) → 2 NO(g) + 3 H₂O(g) .The thermochemical equations for the reaction are given below: N₂(g) + O₂(g) → 2 NO(g)
Δ_rH° = +180.8 kJ/mol-rxn
N₂(g) + 3 H₂(g) → 2 NH₃(g)
Δ_rH° = -91.8 kJ/mol-rxn
2 H₂(g) + O₂(g) → 2 H₂O(g)
Δ_rH° = -483.6 kJ/mol-rxn

A) -1178.2 kJ/mol-rxn
B) -452.8 kJ/mol-rxn
C) -394.6 kJ/mol-rxn
D) -211.0 kJ/mol-rxn
E) +1178.2 kJ/mol-rxn