CHEMICAL REACTIONS o a chemical reaction is an exact recipe for converting raw materials into products or byproducts o The key concept is that of the stoichiometric coefficient o The stoichiometric coefficient ai specifies the mols of the ith component produced per mol of the jth reaction. Reactions take place in mols, not mass!! /2099 Chemical reactor Characterization9/20/99 Chemical Reactor Characterization 3 CHEMICAL REACTIONS u A chemical reaction is an exact recipe for converting raw materials into products or byproducts u The key concept is that of the stoichiometric coefficient u The stoichiometric coefficient aij specifies the mols of the ith component produced per mol of the jth reaction. u Reactions take place in mols, not mass!!