| A | B |
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| Reaction Rate | Rate of reaction for a reactant or product in a particular reaction is intuitively defined as how fast or slow a reaction takes place.,  |
| Chemical Kinetics | The study of rates of chemical processes.,  |
| Reaction Mechanism | Is the step by step sequence of elementary reactions by which overall chemical change occurs,  |
| Intermediate | Being, situated, or acting between two points, stages, things, persons,,  |
| Homogeneous Reaction | Any of a class of chemical reactions that occur in a single phase (gaseous, liquid, or solid).,  |
| Collision Theory | Theory of reaction rates that states that effective collisions between reactant molecules must occur in order for the reaction to occur.,  |
| Heterogeneous Reaction | Reaction where there is an interface between the different components or reactants. Examples of heterogeneous reactions are those between a gas and a solid, a gas and a liquid, two immiscible liquids, or two different solids.,  |
| Catalyst | A substance that initiates or accelerates a chemical reaction without itself being affected,  |
| Activation Energy | The minimum energy required to start a chemical reaction.,  |
| Activated Complex | A transitional structure in a chemical reaction that results from an effective transfusion between molecules and that persists while unaccounted for bonds are breaking and new bonds are forming.,  |
| Catalysis | Speedily process of a chemical reaction by inducing the presence of material that is chemically unchanged at the end of the reaction.,  |
| Homogeneous Catalyst | A sequence of reactions that involve a catalyst in the same phase as the reactants.,  |
| Heterogeneous Catalyst | Refers to the form of catalysis where the phase of the catalyst differs from that of the reactants.,  |
| Rate Law | Equation which links the reaction rate with concentrations or pressures of reactants and constant parameters (normally rate coefficients and partial reaction orders).,  |
| Order | The usual major subdivision of a class or subclass in the classification of organisms, consisting of several families.,  |
| Rate-Determining Step | The slowest step in a mechanism; the step that determines the overall rate of reaction,  |
