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Q: ammonia gas reacts with oxygen as per the following rxn
4NH3 (g) + 3O2 (g) --> 6H2O (g) + 2 N2 (g)
dH, NH3 (g) = 11 Kcal/mole
dH, H2O (g) = 57.8 Kcal/mole
the above rxn is..
A. endothermic
B. exothermic
I say it is endothermic b/c when I go 6*57.8 - 4*11 , it gives me a positive dH for this rxn. But the actual answer is exothermic. Is my calculation wrong??
4NH3 (g) + 3O2 (g) --> 6H2O (g) + 2 N2 (g)
dH, NH3 (g) = 11 Kcal/mole
dH, H2O (g) = 57.8 Kcal/mole
the above rxn is..
A. endothermic
B. exothermic
I say it is endothermic b/c when I go 6*57.8 - 4*11 , it gives me a positive dH for this rxn. But the actual answer is exothermic. Is my calculation wrong??