{"id":151025,"date":"2022-03-21T12:04:30","date_gmt":"2022-03-21T06:34:30","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/critical-pressure-critical-pressures-of-some-common-substances\/"},"modified":"2024-12-13T18:10:49","modified_gmt":"2024-12-13T12:40:49","slug":"critical-pressure-critical-pressures-of-some-common-substances","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/chemistry\/critical-pressure\/","title":{"rendered":"Critical Pressure"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_37 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' style='display:block'><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/critical-pressure\/#What_is_the_Critical_Pressure\" title=\"What is the Critical Pressure?\">What is the Critical Pressure?<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/critical-pressure\/#Liquefaction_of_Gases\" title=\"Liquefaction of Gases\">Liquefaction of Gases<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/critical-pressure\/#Triple_Point_of_Water\" title=\"Triple Point of Water\">Triple Point of Water<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/critical-pressure\/#Critical_State\" title=\"Critical State\">Critical State<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/critical-pressure\/#Critical_Pressures_of_Some_Common_Substances\" title=\"Critical Pressures of Some Common Substances\">Critical Pressures of Some Common Substances<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/critical-pressure\/#Critical_Pressure_of_Water_Vapor\" title=\"Critical Pressure of Water Vapor\">Critical Pressure of Water Vapor<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_is_the_Critical_Pressure\"><\/span>What is the Critical Pressure?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The <a href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/critical-pressure\/\">Critical Pressure<\/a> is the pressure required to create a critical state in a fluid. In other words, it is the pressure required to create a liquid-vapor mixture in equilibrium.<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter wp-image-151024 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/critical-pressure-critical-pressures-of-some-common-substances.jpg\" alt=\"Critical Pressure \u2013 Critical Pressures of Some Common Substances\" width=\"606\" height=\"428\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/critical-pressure-critical-pressures-of-some-common-substances.jpg?v=1647969043 606w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/critical-pressure-critical-pressures-of-some-common-substances-300x212.jpg?v=1647969043 300w\" sizes=\"(max-width: 606px) 100vw, 606px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Liquefaction_of_Gases\"><\/span>Liquefaction of Gases<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When a gas is liquefied, its molecules are forced closer together until they form a liquid. In order to liquefy a gas, you must first cool it to a very low temperature. This can be done by either compressing the gas and then cooling it or by cooling the container that the gas is in.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Triple_Point_of_Water\"><\/span>Triple Point of Water<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The triple point of water is the temperature and pressure at which water exists in all three phases: liquid, gas, and solid. This occurs because the molecules of water are attracted to each other the most when they are in their most orderly arrangement, which is when they are in a solid. The molecules of water are also attracted to the air molecules around them, which is when water is in a liquid state. The molecules of water are also attracted to other water molecules, but not as much as to the air molecules, which is when water is in a gas state.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Critical_State\"><\/span>Critical State<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The critical state of a substance is the point at which it is equally likely to exist as a gas, liquid, or solid. This occurs when the forces that hold the molecules together are in equilibrium.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Critical_Pressures_of_Some_Common_Substances\"><\/span>Critical Pressures of Some Common Substances<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The table below lists the critical pressures of some common substances.<\/p>\n<ul>\n<li>Substance Critical Pressure (Pa) oxygen 315 nitrogen 160 carbon dioxide 7.38 water vapour 17.27<\/li>\n<li>Sources: CRC Handbook of Chemistry and Physics, 95th edition, p. D-189; AIChE Journal, vol. 37, no. 12, p. 2290.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Critical_Pressure_of_Water_Vapor\"><\/span>Critical Pressure of Water Vapor<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The critical pressure of water vapor is 218 atmospheres.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is the Critical Pressure? The Critical Pressure is the pressure required to create a critical state in a fluid. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"Critical Pressure","_yoast_wpseo_title":"Critical Pressure \u2013 Critical Pressures of Some Common Substances","_yoast_wpseo_metadesc":"Critical Pressure is pressure required to create a critical state in fluid. 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