An economic catalyst is an entrepreneur or company that precipitates a fundamental change in business or technology. While this novel still dances on the line between being a kid and growing up, it is apparent that Black's escape from Azkaban is the catalyst that will begin a chain reaction of events. Copyright © 2011. The word comes from chemistry. That time spent in Ghana and across West and sub-Saharan Africa became my catalyst for starting Tala, and I regularly encourage my team members to take on a “figure it out!”. In chemistry, a substance that causes a chemical reaction to occur but is not itself involved in the reaction. During the reaction between the chemical intermediates and the reactants, the catalyst is regenerated. So, more than anything, the endorsement was a catalyst for us to actually say let’s do something, we don’t have to sit around and wait on what are we going to do, endorse or not endorse. A catalyst, therefore, does not appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. A substance that accelerates a chemical reaction but is not consumed or changed permanently thereby. For that reason the catalyst is referred to as "a chemical parson.". Catalysis is defined as increasing the rate of a chemical reaction by introducing a catalyst.A catalyst, in turn, is a substance that is not consumed by the chemical reaction, but acts to lower its activation energy.In other words, a catalyst is both a reactant and product of a chemical reaction. Discussion. Definition of Vandenberg catalyst in the Definitions.net dictionary. Literature is a form of preservation of human culture over the years. Any substance serving as the agent in catalysis. Lady Macbeth is the catalyst that ignites the fire to Macbeth’s ambition. An example of catalyst is how President Bush's claims that Iraq had weapons of mass destruction started the war in Iraq. This process is called catalysis. This character is usually the person that spends the most quality and influential time with the protagonist. A catalyst is an event or person causing a change. 1-6, November 1919 to April 1920 Various Enzymes conform to all of these properties of catalysts, and are commonly defined as the " catalysts of living matter." Catalysis, in chemistry, the modification of the rate of a chemical reaction, usually an acceleration, by addition of a substance not consumed during the reaction.The rates of chemical reactions—that is, the velocities at which they occur—depend upon a number of factors, including the chemical nature of the reacting species and the external conditions to which they are exposed. Getting kicked out of your parents' house might be a catalyst for becoming more independent. Definition of Catalyst. The global demand for catalysts in 2010 was estimated at approximately US$29.5 billion. A catalyst character, also known as a catalytic character, is the character in a story who causes the protagonist, or main character, to move toward some kind of action or transformation. A catalyst is an agent or compound that is added to a process to make a chemical reaction happen more quickly. It is because she challenges his masculinity, questions his love, and belittles his bravery that Macbeth murders Duncan. A catalyst, in turn, is a substance that is not consumed by the chemical reaction, but acts to lower its activation energy. A catalyst is an event or person causing a change. Heterogeneous catalysts are most often solids, and the reacting chemicals are usually gases or liquids that are adsorbed onto the surface of the catalyst. A substance that starts or speeds up a chemical reaction while undergoing no permanent change itself. Information and translations of Vandenberg catalyst in the most comprehensive dictionary definitions resource on the web. A catalyst is not consumed by the reaction and it may participate in multiple reactions at a time. Catalysts synonyms, Catalysts pronunciation, Catalysts translation, English dictionary definition of Catalysts. By definition, the catalyst function is to lower the activation energy for a given reaction so that the reaction would occur at a lower temperature. Categories. Good solid catalysts are usually highly porous, with surface areas of several hundred square meters per gram. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021, Collins English Dictionary - Complete & Unabridged 2012 Digital Edition Find more ways to say catalyst, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. Follow RSS feed Like. Published by Houghton Mifflin Harcourt Publishing Company. 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