{"id":217627,"date":"2025-05-22T08:31:45","date_gmt":"2025-05-22T08:31:45","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=217627"},"modified":"2025-05-22T08:31:47","modified_gmt":"2025-05-22T08:31:47","slug":"what-state-is-present-at-room-temperature","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/22\/what-state-is-present-at-room-temperature\/","title":{"rendered":"What state is present at room temperature"},"content":{"rendered":"\n

Below is the phase diagram for iodine. What state is present at room temperature (i.e., 25.0 C) and normal atmospheric pressure (i.e., 1 atm)?<\/p>\n\n\n\n

a) solid
b) liquid
c) gas
d) All three states exist at room temperature and 1 atm
e) none of these<\/p>\n\n\n\n

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

Correct Answer: a) solid<\/strong><\/p>\n\n\n\n

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

To determine the physical state of iodine at room temperature and 1 atmosphere of pressure, we must analyze the phase diagram of iodine<\/strong>, a graphical representation showing the physical states of a substance under various conditions of temperature<\/strong> and pressure<\/strong>.<\/p>\n\n\n\n

Step 1: Understand the Axes of the Phase Diagram<\/strong><\/h4>\n\n\n\n
    \n
  • The x-axis<\/strong> represents temperature<\/strong>, usually in degrees Celsius.<\/li>\n\n\n\n
  • The y-axis<\/strong> represents pressure<\/strong>, typically in atmospheres (atm)<\/strong> or Pascals (Pa)<\/strong>.<\/li>\n\n\n\n
  • The diagram is divided into regions that correspond to the solid<\/strong>, liquid<\/strong>, and gas<\/strong> phases of the substance.<\/li>\n\n\n\n
  • Lines (boundaries) between these regions indicate the conditions at which two phases coexist in equilibrium<\/strong> (such as melting, boiling, or sublimation points).<\/li>\n<\/ul>\n\n\n\n

    Step 2: Identify Room Temperature and Normal Pressure<\/strong><\/h4>\n\n\n\n
      \n
    • Room temperature is 25.0\u00b0C<\/strong><\/li>\n\n\n\n
    • Normal atmospheric pressure is 1 atm<\/strong><\/li>\n\n\n\n
    • Locate the point (25.0\u00b0C, 1 atm)<\/strong> on the phase diagram.<\/li>\n<\/ul>\n\n\n\n

      Step 3: Analyze the Position of the Point<\/strong><\/h4>\n\n\n\n

      For iodine<\/strong>, the key points are:<\/p>\n\n\n\n

        \n
      • Sublimation point:<\/strong> Iodine sublimates (goes from solid directly to gas) at about 113.7\u00b0C at 1 atm<\/strong>.<\/li>\n\n\n\n
      • Melting point (solid to liquid):<\/strong> Around 113.7\u00b0C<\/strong> at higher pressures.<\/li>\n\n\n\n
      • Boiling point (liquid to gas):<\/strong> About 184.3\u00b0C at 1 atm<\/strong>.<\/li>\n<\/ul>\n\n\n\n

        At 1 atm and 25.0\u00b0C<\/strong>, the point lies well below the melting point and boiling point<\/strong>, and it is located in the solid region<\/strong> of the phase diagram.<\/p>\n\n\n\n

        Step 4: Conclusion<\/strong><\/h4>\n\n\n\n

        Since 25.0\u00b0C and 1 atm fall into the solid region on iodine’s phase diagram, iodine exists as a solid under these conditions<\/strong>.<\/p>\n\n\n\n

        It\u2019s also interesting to note that although iodine is a solid, it can slowly sublimate<\/strong> (turn directly into a purple vapor) at room temperature, giving off a visible violet gas. However, this does not<\/strong> mean it is in the gas phase at 1 atm\u2014it simply means it has a high vapor pressure<\/strong>.<\/p>\n\n\n\n

        Final Answer: a) solid<\/strong><\/h3>\n\n\n\n
        \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

        Below is the phase diagram for iodine. What state is present at room temperature (i.e., 25.0 C) and normal atmospheric pressure (i.e., 1 atm)? a) solidb) liquidc) gasd) All three states exist at room temperature and 1 atme) none of these The Correct Answer and Explanation is: Correct Answer: a) solid Explanation: To determine the […]<\/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-217627","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/217627","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=217627"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/217627\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=217627"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=217627"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=217627"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}