Problem: Calculate the standard molar enthalpy of formation of NO(g) from the following data:N2(g) + 2O2 ⟶ 2NO2(g) ΔH°298 = 66.4 kJ2NO(g) + O2 ⟶ 2NO2(g) ΔH°298 = −114.1 kJ

FREE Expert Solution

We can use Hess’s Law to determine the enthalpy change of the overall reaction from the given reactions:


1.       N2(g) + 2 O2 ⟶ 2NO2(g)         ΔH°298 = 66.4 kJ
2.     2NO(g) + O2 ⟶ 2NO2(g)        ΔH°298 = −114.1 kJ


We now need to find a combination of reactions that when added up, gives us the overall reaction.


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Problem Details

Calculate the standard molar enthalpy of formation of NO(g) from the following data:
N2(g) + 2O2 ⟶ 2NO2(g) ΔH°298 = 66.4 kJ
2NO(g) + O2 ⟶ 2NO2(g) ΔH°298 = −114.1 kJ

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