{"id":23711,"date":"2025-06-17T21:07:07","date_gmt":"2025-06-17T21:07:07","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=23711"},"modified":"2025-06-17T21:07:15","modified_gmt":"2025-06-17T21:07:15","slug":"if-a-reaction-is-exergonic-what-is-the-free-energy-change","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/if-a-reaction-is-exergonic-what-is-the-free-energy-change\/","title":{"rendered":"If a reaction is exergonic, what is the free energy change"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">If a reaction is exergonic, what is the free energy change?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Correct Answer:<\/strong><br>If a reaction is <em>exergonic<\/em>, the <strong>free energy change (\u0394G) is negative<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Explanation (Approx. 300 words):<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In thermodynamics, the free energy change (denoted as <strong>\u0394G<\/strong>) is a measure of the energy available to do work during a chemical reaction. It is used to predict the direction and spontaneity of reactions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">An <strong>exergonic reaction<\/strong> is a chemical reaction that releases energy to the surroundings. These reactions occur spontaneously under the right conditions and are associated with a <strong>negative \u0394G<\/strong>. This negative value indicates that the products of the reaction have <strong>lower free energy<\/strong> than the reactants, meaning energy is lost (usually as heat or work) during the transformation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mathematically, the Gibbs free energy equation is: \u0394G=\u0394H\u2212T\u0394S\\Delta G = \\Delta H &#8211; T\\Delta S<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0394G = change in free energy<\/li>\n\n\n\n<li>\u0394H = change in enthalpy (total energy)<\/li>\n\n\n\n<li>T = temperature (in Kelvin)<\/li>\n\n\n\n<li>\u0394S = change in entropy (disorder)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In an <strong>exergonic<\/strong> process:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0394H is often negative (releases heat), or<\/li>\n\n\n\n<li>\u0394S is positive (increase in disorder), or<\/li>\n\n\n\n<li>Both conditions are met, making \u0394G negative.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">An example of an exergonic reaction is <strong>cellular respiration<\/strong>, where glucose is broken down into carbon dioxide and water, releasing energy that the cell uses for work. The \u0394G for this reaction is approximately <strong>-686 kcal\/mol<\/strong>, indicating that the reaction releases a significant amount of energy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In contrast, <strong>endergonic reactions<\/strong> have a <strong>positive \u0394G<\/strong> and require an input of energy to proceed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In summary, a <strong>negative \u0394G<\/strong> characterizes an exergonic reaction. This means the reaction proceeds with a net release of free energy and can occur spontaneously, making it a key concept in understanding how energy flows in biological and chemical systems.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>If a reaction is exergonic, what is the free energy change? The correct answer and explanation is: Correct Answer:If a reaction is exergonic, the free energy change (\u0394G) is negative. Explanation (Approx. 300 words): In thermodynamics, the free energy change (denoted as \u0394G) is a measure of the energy available to do work during a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-23711","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/23711","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=23711"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/23711\/revisions"}],"predecessor-version":[{"id":23712,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/23711\/revisions\/23712"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=23711"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=23711"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=23711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}