{"id":196553,"date":"2025-03-05T09:22:09","date_gmt":"2025-03-05T09:22:09","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=196553"},"modified":"2025-03-05T09:22:13","modified_gmt":"2025-03-05T09:22:13","slug":"what-physical-property-is-identical-for-the-isomers-of-c5h12","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/05\/what-physical-property-is-identical-for-the-isomers-of-c5h12\/","title":{"rendered":"What physical property is identical for the isomers of C5H12"},"content":{"rendered":"\n<p>What physical property is identical for the isomers of C5H12?<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>The physical property that is identical for the isomers of <strong>C\u2085H\u2081\u2082 (pentane, isopentane, and neopentane)<\/strong> is their <strong>molar mass<\/strong> (or <strong>molecular weight<\/strong>).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>Isomers are compounds that have the <strong>same molecular formula<\/strong> but different structural arrangements. For <strong>C\u2085H\u2081\u2082<\/strong>, there are three possible structural isomers:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>n-Pentane<\/strong> (normal pentane) \u2013 a straight-chain alkane.<\/li>\n\n\n\n<li><strong>Isopentane<\/strong> (methylbutane) \u2013 a branched alkane with one methyl group on the second carbon.<\/li>\n\n\n\n<li><strong>Neopentane<\/strong> (dimethylpropane) \u2013 a highly branched alkane with two methyl groups on the central carbon.<\/li>\n<\/ol>\n\n\n\n<p>Since all three isomers are composed of the same atoms (<strong>5 carbon atoms and 12 hydrogen atoms<\/strong>), their <strong>molar mass<\/strong> remains the same:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Molar mass of C\u2085H\u2081\u2082<\/strong> = (5 \u00d7 12.01 g\/mol) + (12 \u00d7 1.008 g\/mol)<br>= <strong>72.15 g\/mol<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Even though their molar mass is identical, their <strong>physical and chemical properties<\/strong> vary due to differences in molecular structure. These differences affect <strong>boiling points, melting points, densities, and other physical properties<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Boiling point<\/strong>: n-Pentane (36.1\u00b0C) > Isopentane (27.8\u00b0C) > Neopentane (9.5\u00b0C)<\/li>\n\n\n\n<li><strong>Melting point<\/strong>: n-Pentane (-129.7\u00b0C) &lt; Isopentane (-160\u00b0C) &lt; Neopentane (-16.4\u00b0C)<\/li>\n<\/ul>\n\n\n\n<p>The <strong>molar mass<\/strong> remains the same because it depends solely on the number and type of atoms present in the molecule, not their arrangement.<\/p>\n\n\n\n<p>Now, I will generate an image illustrating the three isomers of <strong>C\u2085H\u2081\u2082<\/strong> for better visualization.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/03\/image-224.png\" alt=\"\" class=\"wp-image-196554\"\/><\/figure>\n\n\n\n<p>Here is an image illustrating the three isomers of <strong>C\u2085H\u2081\u2082<\/strong> (pentane, isopentane, and neopentane). It clearly shows their molecular structures and highlights their differences while maintaining the same <strong>molar mass<\/strong>. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>What physical property is identical for the isomers of C5H12? The correct answer and explanation is : The physical property that is identical for the isomers of C\u2085H\u2081\u2082 (pentane, isopentane, and neopentane) is their molar mass (or molecular weight). Explanation: Isomers are compounds that have the same molecular formula but different structural arrangements. For C\u2085H\u2081\u2082, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-196553","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/196553","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=196553"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/196553\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=196553"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=196553"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=196553"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}