{"id":14750,"date":"2023-12-04T07:16:59","date_gmt":"2023-12-04T01:46:59","guid":{"rendered":"https:\/\/www.aplustopper.com\/?p=14750"},"modified":"2023-12-04T17:02:31","modified_gmt":"2023-12-04T11:32:31","slug":"meant-calorific-value-fuel","status":"publish","type":"post","link":"https:\/\/www.aplustopper.com\/meant-calorific-value-fuel\/","title":{"rendered":"What is meant by the calorific value of a fuel?"},"content":{"rendered":"<h2><strong>What is meant by the calorific value of a fuel?<\/strong><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-162827 size-full\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2020\/12\/The-calorific-value-of-a-fuel.png\" alt=\"How is calorific value of a fuel expressed\" width=\"719\" height=\"356\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2020\/12\/The-calorific-value-of-a-fuel.png 719w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2020\/12\/The-calorific-value-of-a-fuel-300x149.png 300w\" sizes=\"(max-width: 719px) 100vw, 719px\" \/><\/p>\n<ul>\n<li>Fuels are substances that can normally burn readily in air or oxygen to produce large quantity of heat.<\/li>\n<li>Examples of some common fuels are petroleum, natural gas and coal. These are called fossil fuels.<\/li>\n<li>Different types of fuels have different heats of combustion. Heat of combustion is expressed in kilojoules per mole.<\/li>\n<li>In our daily life, it is not very practical to measure the quantity of a fuel in mole. We normally measure the quantity of a fuel by its mass.<\/li>\n<li>The <strong>calorific value<\/strong> or\u00a0<strong>fuel value<\/strong> of a fuel is the amount of heat energy given out when <strong>one gram<\/strong> of the fuel is completely burnt in excess of oxygen.<\/li>\n<li>The unit for fuel value is <strong>kJ g<span class=\"MSGENFONTSTYLENAMETEMPLATEROLENUMBERMSGENFONTSTYLENAMEBYROLETEXT2MSGENFONTSTYLEMODIFERBOLD\"><sup><span style=\"font-size: 10.0pt;\">-1<\/span><\/sup><\/span><\/strong>.<\/li>\n<li>Fuel value is also known as <strong>heat value.<\/strong><\/li>\n<li>A fuel with a high fuel value releases a lot of heat per gram when it burns.<\/li>\n<li>Different types of fuels have different fuel values. Some fuels have very high fuel values but have low density, thus occupy a bigger volume. Others have high density but have low fuel values.<\/li>\n<li>Some fuels can cause environmental pollution. There are fuels with high fuel values but are not very economical, not easily available or non-renewable.<\/li>\n<li>The learning of thermochemistry helps us in the selection of a suitable fuel for a specific purpose.<\/li>\n<li>The table below shows the fuel values of some food and common fuels.<br \/>\n<table style=\"height: 128px;\" border=\"2\" width=\"526\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\" width=\"144\"><strong>Substance<\/strong><\/td>\n<td style=\"text-align: center;\" width=\"144\"><strong>Fuel value (kJ g<sup>-1<\/sup>)<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\" width=\"144\">Apple<\/td>\n<td style=\"text-align: center;\" width=\"144\">2<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\" width=\"144\">Egg<\/td>\n<td style=\"text-align: center;\" width=\"144\">6<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\" width=\"144\">Bread<\/td>\n<td style=\"text-align: center;\" width=\"144\">11<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\" width=\"144\">Wood<\/td>\n<td style=\"text-align: center;\" width=\"144\">20<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\" width=\"144\">Coal<\/td>\n<td style=\"text-align: center;\" width=\"144\">30<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\" width=\"144\">Butter<\/td>\n<td style=\"text-align: center;\" width=\"144\">34<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\" width=\"144\">Gasoline<\/td>\n<td style=\"text-align: center;\" width=\"144\">34<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\" width=\"144\">Kerosene<\/td>\n<td style=\"text-align: center;\" width=\"144\">37<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\" width=\"144\">Natural gas<\/td>\n<td style=\"text-align: center;\" width=\"144\">50<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\" width=\"144\">Hydrogen<\/td>\n<td style=\"text-align: center;\" width=\"144\">143<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<\/ul>\n<p>The selection of a fuel to be used in industries depends on the following factors:<\/p>\n<ul>\n<li>Fuel value of the fuel<\/li>\n<li>Cost of the fuel<\/li>\n<li>Availability and sources of fuel<\/li>\n<li>Effect of the fuel on the environment<\/li>\n<li>Technology used to harness the energy from the fuel<\/li>\n<li>Storage space needed to store the fuel<\/li>\n<\/ul>\n<p>Fuels with the following qualities are normally chosen:<\/p>\n<ul>\n<li>High fuel value<\/li>\n<li>Cheap<\/li>\n<li>Easily available<\/li>\n<li>Do not pollute the environment<\/li>\n<li>Easily harnessed<\/li>\n<li>Require less storage space<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-162829 size-full\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2020\/12\/Calorific-value.png\" alt=\"What is a calorific value of a fuel\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2020\/12\/Calorific-value.png 300w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2020\/12\/Calorific-value-150x150.png 150w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2020\/12\/Calorific-value-100x100.png 100w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><strong>Calorific value example:\u00a0<\/strong>The heat of combustion of ethanol is -1376 kj mol<span class=\"MSGENFONTSTYLENAMETEMPLATEROLENUMBERMSGENFONTSTYLENAMEBYROLETEXT2MSGENFONTSTYLEMODIFERBOLD\"><sup><span style=\"font-size: 10.0pt;\">-1<\/span><\/sup><\/span>. Calculate the fuel value of ethanol.<br \/>\n[Relative atomic mass: H, 1; C, 12; O, 16]<br \/>\n<strong>Solution:<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-14751\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2017\/06\/meant-calorific-value-fuel.png\" alt=\"\" width=\"384\" height=\"186\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2017\/06\/meant-calorific-value-fuel.png 384w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2017\/06\/meant-calorific-value-fuel-300x145.png 300w\" sizes=\"(max-width: 384px) 100vw, 384px\" \/><br \/>\n<\/strong><\/p>\n<p><strong>People also ask<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/www.aplustopper.com\/can-energy-changed-chemical-reaction\/\">How can energy be changed in a chemical reaction?<\/a><\/li>\n<li><a href=\"https:\/\/www.aplustopper.com\/energy-profile-diagrams-endothermic-exothermic-reactions\/\">How does the energy level diagram show this reaction is exothermic?<br \/>\n<\/a><\/li>\n<li><a href=\"https:\/\/www.aplustopper.com\/enthalpy-reaction-heat-reaction\/\">What is enthalpy of reaction?<\/a><\/li>\n<li><a href=\"https:\/\/www.aplustopper.com\/heat-of-precipitation\/\">What is heat of precipitation?<\/a><\/li>\n<li><a href=\"https:\/\/www.aplustopper.com\/heat-of-displacement\/\">What is heat of displacement?<\/a><\/li>\n<li><a href=\"https:\/\/www.aplustopper.com\/enthalpy-heat-neutralization\/\">What is the enthalpy of neutralization?<\/a><\/li>\n<li><a href=\"https:\/\/www.aplustopper.com\/enthalpy-heat-combustion\/\">What is the heat of combustion?<\/a><\/li>\n<li><a href=\"https:\/\/www.aplustopper.com\/energy-released-bond-formed\/\">Why is energy released when a bond is formed?<\/a><\/li>\n<li><a href=\"https:\/\/www.aplustopper.com\/applications-exothermic-endothermic-reactions-everyday-life\/\">Applications of exothermic and endothermic reactions in everyday life<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>What is meant by the calorific value of a fuel? Fuels are substances that can normally burn readily in air or oxygen to produce large quantity of heat. Examples of some common fuels are petroleum, natural gas and coal. These are called fossil fuels. Different types of fuels have different heats of combustion. Heat of [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":162826,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[84],"tags":[2834,5803,5802,5800,5804,5805,5801],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v17.8 (Yoast SEO v17.8) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is meant by the calorific value of a fuel? - A Plus Topper<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.aplustopper.com\/meant-calorific-value-fuel\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is meant by the calorific value of a fuel?\" \/>\n<meta property=\"og:description\" content=\"What is meant by the calorific value of a fuel? 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