Chemical Kinetics I. Introduction Reaction rate expresses how quickly reactants are converted into products. In chemical kinetics, the changing values are the amounts of reactants and the amounts of products. Initially, let's say we start with a mixture of N 2 and H 2 .
D t are both negative.
This is because the concentrations are decreasing. This will be true of any reactant. D t is positive, because the concentration is increasing. This will be true of any product. There is a relationship between the three rates.