2. Select all of the following that you would predict to have a positive Î 2 NO2 (g) â N2 (g) + 2ã2 (g) 2502 (g) + O2(g) â 2 SO3 (g) 2 C6H6 (l) + 15 02(g) â 12 CO2 (g) + 6 H2O (g) â¡ 4 NO (g) + 6 H2O (g) â 4 NH3 (g) + 5ã2 (g) 2 BF3 (g) + 3 CaO (s) â B203 (s) + 3 CaF2 (s) 4 C (s) + S8 (s) â 4 CS2 (I) 02 (g) â 2 O (g) CuO (s) + H2 (g) â Cu (s) + H20 (I)