APFIVE Enthalpy Change Using Hess's Law
Given the thermochemical equations below:
N₂(g) + 3H₂(g) → 2NH₃(g) ΔH = -92.2 kJ
N₂(g) + O₂(g) → 2NO(g) ΔH = +180.6 kJ
H₂(g) + ½O₂(g) → H₂O(l) ΔH = -285.8 kJ
NO(g) + ½O₂(g) → NO₂(g) ΔH = -57.1 kJ
What is the value of ΔH for the following reaction?
4NH₃(g) + 7O₂(g) → 4NO₂(g) + 6H₂O(l)
A
+1422.6
B
-1514.8
C
-1397.6
D
-1330.4
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