Dadas as seguintes equações termoquimicas:?

2H2 + O2(g) ---> 2H2(l) ΔH=-571,5 KJ

N2O5(g) + H2O(l) ------> 2HNO3(l) ΔH=-76,6 KJ

1/2 N2 (g) + 3/2O1 + 1/2 H2(g) ----> HNO3(l) ΔH= -174,1 KJ

Calcule ΔH para a reação

2N2(g)+5O2(g) ---> 2N2O5

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