BASIC PRINCIPLES

Hint

• A bimolecular reaction is one which involves two molecules (or atoms) in the elementary step.
• A heterogeneous reaction is one which involves more than one phase; the reaction usually occurring at or very near the interface between the phases.
• A homogeneous reaction is one which involves only one phase.
• An elementary reaction is one which takes place in a single step on the molecular level. An elementary reaction may also be defined as one in which the reaction order of each species is identical with the stoichiometric coefficient of that species for the reaction as written.
• A stoichiometric reaction is the overall chemical reaction indicating the stoichiometric relationship between reactants and products.
• A termolecular reaction is one which involves three molecules (or atoms) in the elementary step.
• A unimolecular reaction is one which involves one molecule (or atom) in the elementary step.
• Molecularity is the number of molecules involved in an elementary step.

Review Question

An Elementary Reaction

Consumes either Earth, Wind, Fire or Water

Involves a process of deductive reasoning

Takes place in a single step on the molecular level