select the correct answer. how does a catalyst speed up a chemical reaction?
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CatalysisA catalyst speeds up a reaction by lowering the activation energy required for the reaction to proceed. To reiterate, catalysts do not affect the equilibrium state of a reaction.
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Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. ... The enzyme active site is the location on the enzyme surface where substrates bind, and where the chemical reaction catalyzed by the enzyme occurs.
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No, yeast is the organism that secretes / produces the catalyst. For the enzyme-substrate complex, the substrate is the hydrogen peroxide, and the enzyme is the molecule of catalase. The more yeast cells there are, the more catalase is secreted, and thus the rate of reaction is increased.
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The Effect of Catalysts on the Activation Energy Barrier. Catalysts provide a new reaction pathway in which a lower A.E. is offered. A catalyst increases the rate of a reaction by lowering the activation energy so that more reactant molecules collide with enough energy to surmount the smaller energy barrier.
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A Catalyst is a substance that speeds up a chemical reaction but is not changed itself by the reaction and can be used again. Examples of catalysts include platinium which is used in car exhausts to break down harmful emissions and yeast is a biological catalyst that speeds up the process of fermentation.
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In organisms, catalysts are called enzymes. Like other catalysts, enzymes are not reactants in the reactions they control. They help the reactants interact but are not used up in the reactions. ... Unlike other catalysts, enzymes are usually highly specific for a particular chemical reaction.
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Catalysts are chemical compounds that increase the rate of a reaction by lowering the activation energy required to reach the transition state. Unlike reactants, a catalyst is not consumed as part of the reaction process.
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The rate for the reaction increases. Reaction rates are roughly doubled when the temperature increases by 10 degrees Kelvin. This means the rate can be quadrupled if the temperature is raised by 20 degrees Kelvin.
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Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. Many enzymes change shape when substrates bind.
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A catalyst is a chemical that increases the rate of a chemical reaction without itself being changed by the reaction. The fact that they aren't changed by participating in a reaction distinguishes catalysts from substrates, which are the reactants on which catalysts work. Enzymes catalyze biochemical reactions.
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In the presence of a catalyst, both the forward and reverse reaction rates will speed up equally, thereby allowing the system to reach equilibrium faster. However, it is very important to keep in mind that the addition of a catalyst has no effect whatsoever on the final equilibrium position of the reaction.
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Reactants are the compounds or elements that react with each other to create a new chemical compound. A catalyst takes part in a reaction by increasing its efficiency (making the reaction simply work or speeding it up), usually by promoting intermediate steps in the reaction.
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Summary – Catalyst vs Reagent A catalyst is a substance that can increase the reaction rate of a particular chemical reaction, while a reagent is a substance or mixture for use in chemical analysis or other reactions.
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Obviously, the greater the amount of heat evolved, the faster the curing reaction and vice versa. ... Increasing the temperature will have the same effect as increasing the amount to be cured. This temperature increase is a simple yet powerful accelerant of the rate of cure.
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Increasing the surface area of a solid reactant exposes more of its particles to attack. This results in an increased chance of collisions between reactant particles, so there are more collisions in any given time and the rate of reaction increases.
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Enzymes are proteins that have a specific function. They speed up the rate of chemical reactions in a cell or outside a cell. Enzymes act as catalysts; they do not get consumed in the chemical reactions that they accelerate. ... There are thousands of reactions that take place in cells and these require energy.
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['exothermic reaction. Type of chemical reaction that releases energy.', 'endothermic reaction. Type of chemical reaction that absorbs energy.', 'catalyst. A substance that speeds up a chemical reaction. ... ', 'rate of reaction. ... ', 'energy. ... ', 'enzyme. ... ', 'chemical bonds between atoms. ... ', 'more.']