The combustion of ammonia is : 4NH3(g)+5O2(g)--> 4NO(g)+6H2O(g)        DeltaH= -905kJ what is the enthalpy of the formation (kJ/mol) of NH3(g) [Heat of formation data: NO(g)=90.4 kJ/ mol, H2O(g)=-241 kJ/mol]

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Chapter6: Thermochemistry
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Problem 46E: The reaction SO3(g)+H2O(l)H2SO4(aq) is the last step in the commercial production of sulfuric acid....
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The combustion of ammonia is :

4NH3(g)+5O2(g)--> 4NO(g)+6H2O(g)        DeltaH= -905kJ

what is the enthalpy of the formation (kJ/mol) of NH3(g)

[Heat of formation data: NO(g)=90.4 kJ/ mol, H2O(g)=-241 kJ/mol]

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