January 2019 1 49 Report
Diketahui reaksi 4NH3 + 7O2 ==> 4NO2 + 6H2O ΔH = - 4c kJ. Jika kalor pembentukan H2O dan NH3 berturut-turut -a dan -B kJ, hitunglah kalor pembentukan NO2 dalam kJ.
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