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Predict the enthalpy change for the reaction:
HCl(g) + NaNO2(s) → HNO2(g) + NaCl(s)
Using the following information:

1) 2NaCl (s) + H2O (l) → 2HCl (g) + Na2O (s) ΔH1 = -507 kJ
2) NO(s) + NO2(g) + Na2O(s) → 2NaNO2 (s) ΔH2 = -427 kJ
3) NO(s) + NO2(g) → N2O(g) + O2(g) ΔH3 = -43 kJ
4) 2HNO2(g) → N2O(g) + O2(g) + H2O(l) ΔH4 = +34 kJ

Sagot :

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