var presentation = ["<word>chemical substance<\/word>","<word>transformed<\/word>","<word>interaction<\/word>","<word>another substance<\/word>","<word>energy<\/word>","<word>chemical reaction<\/word>","<word>concept<\/word>","<word>reaction of a substance<\/word>","<word>close contact<\/word>","<word>mixture<\/word>","<word>solution<\/word>","<word>exposure<\/word>","<word>some form of energy<\/word>","<word>results in some energy exchange<\/word>","<word>constituents of the reaction<\/word>","<word>system environment<\/word>","<phrase>When a <strong data-readahead=\"chemical substance\" class=\"presentation_word\">chemical substance<\/strong> is <strong data-readahead=\"transformed\" class=\"presentation_word\">transformed<\/strong> as a result of its <strong data-readahead=\"interaction\" class=\"presentation_word\">interaction<\/strong> with <strong data-readahead=\"another substance\" class=\"presentation_word\">another substance<\/strong> or with <strong data-readahead=\"energy\" class=\"presentation_word\">energy<\/strong>, a <strong data-readahead=\"chemical reaction\" class=\"presentation_word\">chemical reaction<\/strong> is said to have occurred. A <strong data-readahead=\"chemical reaction\">chemical reaction<\/strong> is therefore a <strong data-readahead=\"concept\" class=\"presentation_word\">concept<\/strong> related to the <strong data-readahead=\"reaction of a substance\" class=\"presentation_word\">reaction of a substance<\/strong> when it comes in <strong data-readahead=\"close contact\" class=\"presentation_word\">close contact<\/strong> with another, whether as a <strong data-readahead=\"mixture\" class=\"presentation_word\">mixture<\/strong> or a <strong data-readahead=\"solution\" class=\"presentation_word\">solution<\/strong>; <strong data-readahead=\"exposure\" class=\"presentation_word\">exposure<\/strong> to <strong data-readahead=\"some form of energy\" class=\"presentation_word\">some form of energy<\/strong>, or both. It <strong data-readahead=\"results in some energy exchange\" class=\"presentation_word\">results in some energy exchange<\/strong> between the <strong data-readahead=\"constituents of the reaction\" class=\"presentation_word\">constituents of the reaction<\/strong> as well as with the <strong data-readahead=\"system environment\" class=\"presentation_word\">system environment<\/strong>, which may be designed vessels-often laboratory glassware.<\/phrase>","<word>Chemical reactions<\/word>","<word>formation<\/word>","<word>dissociation<\/word>","<word>molecules<\/word>","<word>molecules breaking apart<\/word>","<word>form<\/word>","<word>two or more molecules<\/word>","<word>rearrangement of atoms<\/word>","<word>making<\/word>","<word>breaking<\/word>","<word>chemical bonds<\/word>","<word>Oxidation<\/word>","<word>reduction<\/word>","<word>acid\u2013base neutralization<\/word>","<word>molecular rearrangement<\/word>","<phrase><strong data-readahead=\"Chemical reactions\" class=\"presentation_word\">Chemical reactions<\/strong> can result in the <strong data-readahead=\"formation\" class=\"presentation_word\">formation<\/strong> or <strong data-readahead=\"dissociation\" class=\"presentation_word\">dissociation<\/strong> of <strong data-readahead=\"molecules\" class=\"presentation_word\">molecules<\/strong>, that is, <strong data-readahead=\"molecules breaking apart\" class=\"presentation_word\">molecules breaking apart<\/strong> to <strong data-readahead=\"form\" class=\"presentation_word\">form<\/strong> <strong data-readahead=\"two or more molecules\" class=\"presentation_word\">two or more molecules<\/strong> or <strong data-readahead=\"rearrangement of atoms\" class=\"presentation_word\">rearrangement of atoms<\/strong> within or across <strong data-readahead=\"molecules\">molecules<\/strong>. <strong data-readahead=\"Chemical reactions\">Chemical reactions<\/strong> usually involve the <strong data-readahead=\"making\" class=\"presentation_word\">making<\/strong> or <strong data-readahead=\"breaking\" class=\"presentation_word\">breaking<\/strong> of <strong data-readahead=\"chemical bonds\" class=\"presentation_word\">chemical bonds<\/strong>. <strong data-readahead=\"Oxidation\" class=\"presentation_word\">Oxidation<\/strong>, <strong data-readahead=\"reduction\" class=\"presentation_word\">reduction<\/strong>, <strong data-readahead=\"dissociation\">dissociation<\/strong>, <strong data-readahead=\"acid\u2013base neutralization\" class=\"presentation_word\">acid\u2013base neutralization<\/strong> and <strong data-readahead=\"molecular rearrangement\" class=\"presentation_word\">molecular rearrangement<\/strong> are some of the commonly used kinds of <strong data-readahead=\"Chemical reactions\">Chemical reactions<\/strong>.<\/phrase>","<word>chemical reaction<\/word>","<word>symbolically depicted<\/word>","<word>chemical equation<\/word>","<word>non-nuclear chemical reaction<\/word>","<word>number and kind of atoms<\/word>","<word>both sides of the equation<\/word>","<word>equal<\/word>","<word>nuclear reaction<\/word>","<word>nuclear particles<\/word>","<word>protons<\/word>","<word>neutrons<\/word>","<phrase>A <strong data-readahead=\"chemical reaction\" class=\"presentation_word\">chemical reaction<\/strong> can be <strong data-readahead=\"symbolically depicted\" class=\"presentation_word\">symbolically depicted<\/strong> through a <strong data-readahead=\"chemical equation\" class=\"presentation_word\">chemical equation<\/strong>. While in a <strong data-readahead=\"non-nuclear chemical reaction\" class=\"presentation_word\">non-nuclear chemical reaction<\/strong> the <strong data-readahead=\"number and kind of atoms\" class=\"presentation_word\">number and kind of atoms<\/strong> on <strong data-readahead=\"both sides of the equation\" class=\"presentation_word\">both sides of the equation<\/strong> are <strong data-readahead=\"equal\" class=\"presentation_word\">equal<\/strong>, for a <strong data-readahead=\"nuclear reaction\" class=\"presentation_word\">nuclear reaction<\/strong> this holds true only for the <strong data-readahead=\"nuclear particles\" class=\"presentation_word\">nuclear particles<\/strong> (<strong data-readahead=\"protons\" class=\"presentation_word\">protons<\/strong> and <strong data-readahead=\"neutrons\" class=\"presentation_word\">neutrons<\/strong>).<\/phrase>","<word>sequence of steps<\/word>","<word>reorganization<\/word>","<word>chemical bonds<\/word>","<word>chemical reaction<\/word>","<word>mechanism<\/word>","<word>take place<\/word>","<word>number of steps<\/word>","<word>different speed<\/word>","<word>reaction intermediates<\/word>","<word>variable stability<\/word>","<word>during the course of a reaction<\/word>","<word>Reaction mechanisms<\/word>","<word>proposed to explain<\/word>","<word>kinetics<\/word>","<word>relative product mix<\/word>","<word>physical chemists<\/word>","<word>exploring<\/word>","<word>proposing<\/word>","<word>mechanisms<\/word>","<word>Chemical reactions<\/word>","<phrase>The <strong data-readahead=\"sequence of steps\" class=\"presentation_word\">sequence of steps<\/strong> in which the <strong data-readahead=\"reorganization\" class=\"presentation_word\">reorganization<\/strong> of <strong data-readahead=\"chemical bonds\" class=\"presentation_word\">chemical bonds<\/strong> may be taking place in the course of a <strong data-readahead=\"chemical reaction\" class=\"presentation_word\">chemical reaction<\/strong> is called its <strong data-readahead=\"mechanism\" class=\"presentation_word\">mechanism<\/strong>. A <strong data-readahead=\"chemical reaction\">chemical reaction<\/strong> can be envisioned to <strong data-readahead=\"take place\" class=\"presentation_word\">take place<\/strong> in a <strong data-readahead=\"number of steps\" class=\"presentation_word\">number of steps<\/strong>, each of which may have a <strong data-readahead=\"different speed\" class=\"presentation_word\">different speed<\/strong>. Many <strong data-readahead=\"reaction intermediates\" class=\"presentation_word\">reaction intermediates<\/strong> with <strong data-readahead=\"variable stability\" class=\"presentation_word\">variable stability<\/strong> can thus be envisaged <strong data-readahead=\"during the course of a reaction\" class=\"presentation_word\">during the course of a reaction<\/strong>. <strong data-readahead=\"Reaction mechanisms\" class=\"presentation_word\">Reaction mechanisms<\/strong> are <strong data-readahead=\"proposed to explain\" class=\"presentation_word\">proposed to explain<\/strong> the <strong data-readahead=\"kinetics\" class=\"presentation_word\">kinetics<\/strong> and the <strong data-readahead=\"relative product mix\" class=\"presentation_word\">relative product mix<\/strong> of a reaction. Many <strong data-readahead=\"physical chemists\" class=\"presentation_word\">physical chemists<\/strong> specialize in <strong data-readahead=\"exploring\" class=\"presentation_word\">exploring<\/strong> and <strong data-readahead=\"proposing\" class=\"presentation_word\">proposing<\/strong> the <strong data-readahead=\"mechanisms\" class=\"presentation_word\">mechanisms<\/strong> of various <strong data-readahead=\"Chemical reactions\" class=\"presentation_word\">Chemical reactions<\/strong>. Several empirical rules, like the Woodward\u2013Hoffmann rules often come in handy while <strong data-readahead=\"proposing\">proposing<\/strong> a <strong data-readahead=\"mechanism\">mechanism<\/strong> for a <strong data-readahead=\"chemical reaction\">chemical reaction<\/strong>.<\/phrase>","<word>chemical reaction<\/word>","<word>process<\/word>","<word>results in<\/word>","<word>interconversion<\/word>","<word>chemical species<\/word>","<word>elementary reaction<\/word>","<word>stepwise reaction<\/word>","<word>interconversion of conformers<\/word>","<word>experimentally observable<\/word>","<word>Chemical reactions<\/word>","<phrase>According to the IUPAC gold book, a <strong data-readahead=\"chemical reaction\" class=\"presentation_word\">chemical reaction<\/strong> is \"a <strong data-readahead=\"process\" class=\"presentation_word\">process<\/strong> that <strong data-readahead=\"results in\" class=\"presentation_word\">results in<\/strong> the <strong data-readahead=\"interconversion\" class=\"presentation_word\">interconversion<\/strong> of <strong data-readahead=\"chemical species\" class=\"presentation_word\">chemical species<\/strong>.\" Accordingly, a <strong data-readahead=\"chemical reaction\">chemical reaction<\/strong> may be an <strong data-readahead=\"elementary reaction\" class=\"presentation_word\">elementary reaction<\/strong> or a <strong data-readahead=\"stepwise reaction\" class=\"presentation_word\">stepwise reaction<\/strong>. An additional caveat is made, in that this definition includes cases where the <strong data-readahead=\"interconversion of conformers\" class=\"presentation_word\">interconversion of conformers<\/strong> is <strong data-readahead=\"experimentally observable\" class=\"presentation_word\">experimentally observable<\/strong>. Such detectable <strong data-readahead=\"Chemical reactions\" class=\"presentation_word\">Chemical reactions<\/strong> normally involve sets of molecular entities as indicated by this definition, but it is often conceptually convenient to use the term also for changes involving single molecular entities.<\/phrase>"];
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