We’re being asked to determine the enthalpy change (ΔHrxn) for the chemical reaction:
2 NO(g) + O2(g) → 2 NO2(g)
We can use Hess’s Law to determine the enthalpy change of the overall reaction from the given reactions:
Calculate the enthalpy of the reaction
2NO(g) + O2(g) → 2NO2(g)
Given the following reactions and enthalpies of formation:
½ N2(g) + O2(g) → NO2(g) Change in Heat a = 33.2 KJ
½ N2(g) + ½ O2 (g) → NO(g) Change in Heat b = 90.2 KJ
Express your answer numerically in kilojoules.
Change in Heat = ? KJ/mol
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