{"id":1522,"date":"2016-03-15T08:40:22","date_gmt":"2016-03-15T08:40:22","guid":{"rendered":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/?page_id=1522"},"modified":"2016-03-15T08:40:44","modified_gmt":"2016-03-15T08:40:44","slug":"1522-2","status":"publish","type":"page","link":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/1522-2\/","title":{"rendered":"Exercise 1_2A MCQ6 Help Card"},"content":{"rendered":"<table>\n<tbody>\n<tr>\n<td><a href=\"https:\/\/blogs.glowscotland.org.uk\/gc\/public\/hyndsechchemu1hwrk\/uploads\/sites\/5080\/2015\/12\/LO1_A10.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1082\" 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250w\" sizes=\"auto, (max-width: 280px) 85vw, 280px\" \/><\/a><\/td>\n<td>The key points you need to consider in this question are as follows:<\/p>\n<ul>\n<li>Chemical reactions\u00a0require energy to occur.<\/li>\n<li>The Activation Energy (for any reaction) is the difference between the reactant enthalpy and the high point on the reaction pathway.<\/li>\n<li>The\u00a0lower the Activation Energy, the less energy is required for a reaction to occur.<\/li>\n<li>\u00a0The warmer the environment, the more energy there is available to allow a reaction to occur.\u00a0 That&#8217;s why heating a chemical reaction speeds it up.<\/li>\n<\/ul>\n<p>These considerations will reduce you two possible options.<\/p>\n<p>The following allows you to choose the correct answer.<\/p>\n<ul>\n<li>In <strong>exothermic reactions<\/strong>, chemical potential energy is changed into heat energy, and released.\u00a0 As energy is released the enthalpy of the products (H<sub><span style=\"font-size: x-large\"><sub>p<\/sub><\/span><\/sub>) must be lower than the enthalpy of the reactants (H<sub><span style=\"font-size: x-large\"><sub>r<\/sub>)<\/span><\/sub>. <strong>\u0394H <\/strong>is\u00a0 <strong>negative<\/strong>\u00a0for an exothermic reaction.<\/li>\n<li>In <strong>endothermic reactions<\/strong>, heat energy is taken in from the surroundings and changed into chemical potential energy. As energy is gained in this reaction, the enthalpy of the products (H<sub><span style=\"font-size: x-large\"><sub>p<\/sub><\/span><\/sub>) must be greater than the enthalpy of the reactants (H<sub><span style=\"font-size: x-large\"><sub>r<\/sub>)<\/span><\/sub>. <strong>\u0394H\u00a0<\/strong>is <strong>positive<\/strong> for an endothermic reaction.<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; The key points you need to consider in this question are as follows: Chemical reactions\u00a0require energy to occur. The Activation Energy (for any reaction) is the difference between the reactant enthalpy and the high point on the reaction pathway. The\u00a0lower the Activation Energy, the less energy is required for a reaction to occur. \u00a0The &hellip; <a href=\"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/1522-2\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Exercise 1_2A MCQ6 Help Card&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2454,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1522","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/pages\/1522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/comments?post=1522"}],"version-history":[{"count":2,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/pages\/1522\/revisions"}],"predecessor-version":[{"id":1524,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/pages\/1522\/revisions\/1524"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/media?parent=1522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}