{"id":440,"date":"2020-10-13T10:26:15","date_gmt":"2020-10-13T10:26:15","guid":{"rendered":"https:\/\/www.energykids.eu\/?page_id=457"},"modified":"2024-12-13T07:06:45","modified_gmt":"2024-12-13T07:06:45","slug":"chemical-energy","status":"publish","type":"page","link":"https:\/\/www.energykids.eu\/bg\/energy\/energy-type\/chemical-energy\/","title":{"rendered":"\ud83e\uddea Chemical energy"},"content":{"rendered":"<h2>Chemical energy<\/h2>\n\n\n<p><strong>Chemical energy<\/strong>&nbsp;is one of the 7 main forms of energy. Chemical energy is potential energy. That type of energy comes from the bonds of atoms and molecules.<\/p>\n\n\n\n<p>Chemical energy as heat is possible to be released during a chemical reaction. The chemists called it an exothermic reaction.<br>Some of the reactions require an input of heat to proceed. During such a reaction that energy can be stored as chemical energy in newly formed bonds.<br>Food also consists of chemical energy that the body converts into mechanical energy and heat.<\/p>\n\n\n\n<p><strong>Chemical reactions<\/strong><br>Chemical reactions are everywhere around us. When your mom is cooking is a chemical reaction between different ingredients and products. When your dad is driving a car is also a type of chemical energy.<\/p>\n\n\n\n<p>Photosynthesis is also a chemical reaction. This is a process where the plants using light energy from the sun convert carbon dioxide and water to glucose sugar and oxygen gas through a series of reactions.<\/p>\n\n\n\n<p>Chemical reactions can be placed in the following categories:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Combustion<\/li>\n\n\n\n<li>Synthesis<\/li>\n\n\n\n<li>Single displacement<\/li>\n\n\n\n<li>Decomposition<\/li>\n\n\n\n<li>Double displacement<\/li>\n\n\n\n<li>Acid-base<\/li>\n<\/ul>\n\n\n\n<p>Combustion<br>During this reaction, the oxygen combines with another compound to form water and carbon dioxide. This type of reaction produces heat \u2013 exothermic reaction.<br><em>An example \u2013 the burning of naphthalene:<\/em><\/p>\n\n\n\n<h5 class=\"wp-block-heading\">C<sub>10<\/sub>H<sub>8<\/sub>&nbsp;+ 12 O<sub>2<\/sub>&nbsp;\u2013&gt; 10 CO<sub>2<\/sub>&nbsp;+ 4 H<sub>2<\/sub>O<\/h5>\n\n\n\n<p>Synthesis<br>When two or more simple compounds combine to form a more complicated one.<br><em>Example is the combination of iron and sulfur to form iron sulfide:<\/em><\/p>\n\n\n\n<h5 class=\"wp-block-heading\">8 Fe + S<sub>8<\/sub>&nbsp;\u2013&gt; 8 FeS<\/h5>\n\n\n\n<p>Decomposition<br>This is the opposite of a synthesis reaction. During the decomposition reaction, a complex molecule breaks down to make simpler ones. In other words, one compound decomposes (splits-up) into two or more compounds and\/or elements. Most decomposition reactions are endothermic.<\/p>\n\n\n\n<p><em>Examples<br>The process of electrolysis of water into oxygen and hydrogen gas:<\/em><\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><em>2 H<sub>2<\/sub>O \u2013&gt; 2 H<sub>2<\/sub>&nbsp;+ O<sub>2<\/sub><\/em><\/h5>\n\n\n\n<p>Process of decomposition of potassium chloride into potassium and chlorine gas:<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">2 KCl(s) \u2192 2 K(s) + Cl<sub>2<\/sub>(g)<\/h5>\n\n\n\n<p>Single displacement (substitution)<br>When one element trades places with another element in a compound.<\/p>\n\n\n\n<p><em>Examples<br>Process when zinc combines with hydrochloric acid. The zinc replaces the hydrogen:<\/em><\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Zn + 2 HCl \u2013&gt; ZnCl<sub>2<\/sub>&nbsp;+ H<sub>2<\/sub><\/h5>\n\n\n\n<p>When hydrogen react with magnesium the hydrogen is replaced\/displaced by magnesium:<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Mg + HCl \u2013&gt; MgCl<sub>2<\/sub>&nbsp;+ H<sub>2<\/sub><\/h5>\n\n\n\n<p>Double displacement<br>When the anions and cations of two different molecules switch places, forming two entirely different compounds.<\/p>\n\n\n\n<p><em><br>Equation is expressed as:<br>The equation is expressed in general as :<\/em><\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><em>AB + CD \u2013&gt; AC + BD<\/em><\/h5>\n\n\n\n<p>Aqueous barium chloride reacts with sulfuric acid to form solid barium sulfate and hydrochloric acid:<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">BaCl<sub>2<\/sub>&nbsp;(aq) + H<sub>2<\/sub>&nbsp;SO<sub>4<\/sub>&nbsp;(aq) \u2192 BaSO<sub>4<\/sub>&nbsp;(s) + 2HCl (aq)<\/h5>\n\n\n\n<p>Acid-base<br>This is a type of double displacement reaction that takes place when an acid and base react with each other.<\/p>\n\n\n\n<p><em>Examples<br>The most fundamental acid-base reaction is the dissociation of water:<\/em><\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><em>H<sub>2<\/sub>O \u2013&gt; H+ + OH-<\/em><\/h5>\n<div class=\"gsp_post_data\" \r\n\t            data-post_type=\"page\" \r\n\t            data-cat=\"energy-form\" \r\n\t            data-modified=\"120\"\r\n\t            data-created=\"1602584775\"\r\n\t            data-title=\"\ud83e\uddea Chemical energy\" \r\n\t            data-home=\"https:\/\/www.energykids.eu\/bg\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Chemical energy Chemical energy&nbsp;is one of the 7 main forms of energy. Chemical energy is potential energy. That type of<\/p>","protected":false},"author":1,"featured_media":1638,"parent":365,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","_uag_custom_page_level_css":"","_kadence_starter_templates_imported_post":false,"footnotes":""},"categories":[48],"tags":[],"class_list":["post-440","page","type-page","status-publish","has-post-thumbnail","hentry","category-energy-form"],"uagb_featured_image_src":{"full":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals.jpg",1280,1280,false],"thumbnail":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals-150x150.jpg",150,150,true],"medium":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals-300x300.jpg",300,300,true],"medium_large":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals-768x768.jpg",768,768,true],"large":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals-1024x1024.jpg",800,800,true],"hd_qu_size2":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals.jpg",400,400,false],"1536x1536":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals.jpg",1280,1280,false],"2048x2048":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals.jpg",1280,1280,false],"trp-custom-language-flag":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals.jpg",12,12,false],"colormag-highlighted-post":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals-392x272.jpg",392,272,true],"colormag-featured-post-medium":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals-390x205.jpg",390,205,true],"colormag-featured-post-small":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals-130x90.jpg",130,90,true],"colormag-featured-image":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals-800x445.jpg",800,445,true],"colormag-default-news":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals-150x150.jpg",150,150,true],"colormag-featured-image-large":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals-1280x600.jpg",1280,600,true],"colormag-elementor-block-extra-large-thumbnail":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals.jpg",480,480,false],"colormag-elementor-grid-large-thumbnail":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals.jpg",417,417,false],"colormag-elementor-grid-small-thumbnail":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals.jpg",285,285,false],"colormag-elementor-grid-medium-large-thumbnail":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals.jpg",198,198,false],"gamipress-points":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals.jpg",50,50,false],"gamipress-achievement":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals.jpg",100,100,false],"gamipress-rank":["https:\/\/www.energykids.eu\/wp-content\/uploads\/2024\/12\/chemicals.jpg",100,100,false]},"uagb_author_info":{"display_name":"energyadmin","author_link":"https:\/\/www.energykids.eu\/bg\/author\/energyadmin\/"},"uagb_comment_info":0,"uagb_excerpt":"Chemical energy Chemical energy&nbsp;is one of the 7 main forms of energy. Chemical energy is potential energy. That type of","_links":{"self":[{"href":"https:\/\/www.energykids.eu\/bg\/wp-json\/wp\/v2\/pages\/440","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.energykids.eu\/bg\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.energykids.eu\/bg\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.energykids.eu\/bg\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.energykids.eu\/bg\/wp-json\/wp\/v2\/comments?post=440"}],"version-history":[{"count":2,"href":"https:\/\/www.energykids.eu\/bg\/wp-json\/wp\/v2\/pages\/440\/revisions"}],"predecessor-version":[{"id":1639,"href":"https:\/\/www.energykids.eu\/bg\/wp-json\/wp\/v2\/pages\/440\/revisions\/1639"}],"up":[{"embeddable":true,"href":"https:\/\/www.energykids.eu\/bg\/wp-json\/wp\/v2\/pages\/365"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.energykids.eu\/bg\/wp-json\/wp\/v2\/media\/1638"}],"wp:attachment":[{"href":"https:\/\/www.energykids.eu\/bg\/wp-json\/wp\/v2\/media?parent=440"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.energykids.eu\/bg\/wp-json\/wp\/v2\/categories?post=440"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.energykids.eu\/bg\/wp-json\/wp\/v2\/tags?post=440"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}