Consider an initial mixture of N2 and H2 gases that can be represented as follows. N2 H2 The gases react to form ammonia gas (NH3) as represented by the following concentration profile. Time Concentration a. Label each plot on the graph as N2, H2, or NH3 and explain your answers. b. Explain the relative shapes of the plots. c. When is equilibrium reached? How do you know?

Gen Chem Notes: Determining rate orders: For this experiment we will solve for the rate orders. To determine A, we will want to look for a spot where A changes but the value of B stays the same. Therefore, we may compare experiments 1 and 2. Between these experiments A doubles, while the rate quadruples. This means that A is a 2 order. To determine B we may do the same with experiments 2 and 3. In this we see that B doubles, but the rate does not change. This means that B is zero order, for if the rate does not change while the concentration does then it is zero order. Therefore, the total order of this reaction is 2, and the equation is rate = K [A]^2. Once one has solved