In each of the following gas-phase reactions, determine whether the total pressure at the end of the reaction (carried out in a sealed, rigid vessel) will be greater than, less than, or equal to the total pressure at the beginning. Assume all reactants and products are gases at the same temperature. a. H2(g) 1 Cl2(g) S 2 HCl(g) b. 4 NH3(g) 1 5 O2(g) S 4 NO(g) 1 6 H2O(g) c. 2 NO(g) 1 O2(g) S 2 NO2(g)