{"id":143576,"date":"2024-09-23T21:14:32","date_gmt":"2024-09-23T21:14:32","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=143576"},"modified":"2024-09-23T21:14:34","modified_gmt":"2024-09-23T21:14:34","slug":"which-of-the-following-compounds-is-a-gas-at-room-temperature","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/09\/23\/which-of-the-following-compounds-is-a-gas-at-room-temperature\/","title":{"rendered":"Which of the following compounds is a gas at room temperature"},"content":{"rendered":"\n

Which of the following compounds is a gas at room temperature? <\/p>\n\n\n\n

A : CH3CH2OH <\/p>\n\n\n\n

B : CH3CH2CH2CH2CH2CH2CH3 <\/p>\n\n\n\n

C : CH3CH2CH3 <\/p>\n\n\n\n

D : HOCH2CH2OH<\/p>\n\n\n\n

The Correct answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

The correct answer is C: CH\u2083CH\u2082CH\u2083<\/strong> (propane).<\/p>\n\n\n\n

Explanation:<\/h3>\n\n\n\n

At room temperature (around 20-25\u00b0C or 68-77\u00b0F), the physical state of a compound depends on the strength of the intermolecular forces between its molecules. Let’s analyze each compound and its intermolecular forces to determine which is a gas at room temperature.<\/p>\n\n\n\n

A: CH\u2083CH\u2082OH (ethanol)<\/strong><\/h4>\n\n\n\n

Ethanol is a small alcohol molecule. It has a hydroxyl group (-OH), which makes it capable of forming hydrogen bonds, a type of strong intermolecular force. These hydrogen bonds hold the ethanol molecules together, requiring more energy (heat) to separate them, so ethanol exists as a liquid<\/strong> at room temperature.<\/p>\n\n\n\n

B: CH\u2083CH\u2082CH\u2082CH\u2082CH\u2082CH\u2082CH\u2083 (heptane)<\/strong><\/h4>\n\n\n\n

Heptane is an alkane with seven carbon atoms. As the length of the carbon chain increases, so do the Van der Waals (dispersion) forces between the molecules, making it harder for the molecules to move apart. Heptane, with its larger molecular mass and stronger dispersion forces, exists as a liquid<\/strong> at room temperature.<\/p>\n\n\n\n

C: CH\u2083CH\u2082CH\u2083 (propane)<\/strong><\/h4>\n\n\n\n

Propane is an alkane with three carbon atoms. Alkanes are nonpolar molecules and exhibit weak Van der Waals forces. Because propane is small and has weaker intermolecular forces compared to larger hydrocarbons, less energy is needed for its molecules to escape into the gas phase. As a result, propane exists as a gas<\/strong> at room temperature.<\/p>\n\n\n\n

D: HOCH\u2082CH\u2082OH (ethylene glycol)<\/strong><\/h4>\n\n\n\n

Ethylene glycol is another alcohol with two hydroxyl groups. These hydroxyl groups enable it to form strong hydrogen bonds between molecules. Due to these strong intermolecular forces, ethylene glycol is a liquid<\/strong> at room temperature.<\/p>\n\n\n\n

In summary, propane (C: CH\u2083CH\u2082CH\u2083)<\/strong> is a gas at room temperature due to its relatively small molecular size and weak intermolecular forces.<\/p>\n","protected":false},"excerpt":{"rendered":"

Which of the following compounds is a gas at room temperature? A : CH3CH2OH B : CH3CH2CH2CH2CH2CH2CH3 C : CH3CH2CH3 D : HOCH2CH2OH The Correct answer and Explanation is: The correct answer is C: CH\u2083CH\u2082CH\u2083 (propane). Explanation: At room temperature (around 20-25\u00b0C or 68-77\u00b0F), the physical state of a compound depends on the strength of […]<\/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-143576","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/143576","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=143576"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/143576\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=143576"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=143576"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=143576"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}