All of the following reactions are called combination reactions except: A. BaO(s) + SO2(g) → BaSO3(s). B. C6H10(l) + Br2(l) → C6H10Br2(l). C. Br2(l) + H2O(l) → HOBr(aq) + HBr(aq). D. CaCl2(s) + 6H2O(l) → CaCl2 • 6H2O(s). E. 3H2(g) + N2(g) → 2NH3(g).

Using this reversible reaction, answer the questions below: n2o4 2no2 (colorless) (reddish-brown) -as the temperature increased, what happened to the n2o4 concentration? -was the formation of reactants or products favored by the addition of heat? -which reaction is exothermic? right to left or left to right? -if the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct? n2o4 2no2 + 14 kcal n2o4 2no2, hr = +14 kcal n2o4 + 14 kcal 2no2 n2o4 2no2, hr = -14 kcal