What do the symbols tell you about the conditions of the reactions shown to the right? Check all of the boxes that apply. The products and reactants of both reactions are gases. Reaction 1 occurs at high pressure. Reaction 2 makes a small amount of an additional product. A catalyst is used for reaction 2. Two equations: 1: 3 upper H subscript 2 (g) plus upper N subscript 2 (g), 450 degrees Celsius over right arrow, 2 upper N upper H subscript 2 (g). 2. Two upper S upper O subscript 2 (g) plus upper O subscript 2 (g), v subscript 2 upper O subscript 5 over right arrow, 2 upper S upper O subscript 3 (g).