Results for “Catalyst”
35 terms · page 1 of 2
Catalyst
A substance that increases the rate of a reaction by providing an alternative pathway of lower activation energy, without being consumed.
Chemical Kinetics & CatalysisCatalyst Poisoning
The loss of catalytic activity caused by a substance binding irreversibly to the active sites.
Chemical EquilibriumEffect of a Catalyst on Equilibrium
A catalyst changes how quickly equilibrium is reached but never where that equilibrium lies.
Chemical Kinetics & CatalysisActive Site
The specific region of a catalyst or enzyme at which the reacting molecules bind and are transformed.
Chemical Kinetics & CatalysisCatalysis
The process by which a reaction rate is increased through the action of a catalyst.
Biochemistry & Polymer ChemistryEnzyme
A biological catalyst, almost always a protein, that accelerates a specific biochemical reaction.
Organic ChemistryFriedel–Crafts Reaction
The introduction of an alkyl or acyl group onto an aromatic ring using a Lewis acid catalyst.
Chemical Kinetics & CatalysisHeterogeneous Catalysis
Catalysis in which the catalyst is in a different phase from the reactants, usually a solid with gaseous or liquid reagents.
Chemical Kinetics & CatalysisHomogeneous Catalysis
Catalysis in which the catalyst is in the same phase as the reactants.
Chemical EquilibriumOptimum Conditions for Industrial Yield
The compromise set of temperature, pressure and catalyst chosen to balance equilibrium yield against reaction rate and cost.
Chemical Kinetics & CatalysisPromoter
A substance that has little catalytic activity itself but greatly increases the effectiveness of a catalyst.
Chemical Kinetics & CatalysisSelectivity
The ability of a catalyst to direct a reaction towards one particular product among several possible ones.
Chemical Kinetics & CatalysisActivation Energy
The minimum energy that colliding particles must possess for a reaction to occur.
Biochemistry & Polymer ChemistryAddition Polymerisation
Polymerisation in which unsaturated monomers add to one another with no loss of any atoms.
Stoichiometry & Chemical ReactionsChemical Equation
A symbolic representation of a chemical reaction showing reactants on the left and products on the right.
Chemical Kinetics & CatalysisChemical Kinetics
The study of reaction rates, the factors that influence them, and the step-by-step mechanisms by which reactions occur.
Chemical Kinetics & CatalysisEffective Collision
A collision that actually leads to reaction because it has both sufficient energy and correct orientation.
Biochemistry & Polymer ChemistryEnzyme Specificity
The ability of an enzyme to select one substrate, or one class of substrate, and catalyse one particular reaction.
Chemical EquilibriumEquilibrium Constant
The fixed ratio of product to reactant terms, each raised to its stoichiometric power, that characterises a reaction at a given temperature.
Chemical EquilibriumEquilibrium Yield
The proportion of reactant converted to product once equilibrium has been reached.
Stoichiometry & Chemical ReactionsEsterification
The acid-catalysed condensation of a carboxylic acid with an alcohol to form an ester and water.
Electrochemistry & RedoxFuel Cell
An electrochemical cell that generates electricity continuously from a fuel and oxidant supplied from outside.
Electrochemistry & RedoxHydrogen–Oxygen Fuel Cell
A fuel cell in which hydrogen is oxidised at the anode and oxygen reduced at the cathode, producing only water.
Nuclear & RadiochemistryNuclear Chemistry
The study of changes that occur in atomic nuclei and of the properties of radioactive substances.