{"id":218463,"date":"2025-05-23T19:41:44","date_gmt":"2025-05-23T19:41:44","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=218463"},"modified":"2025-05-23T19:41:46","modified_gmt":"2025-05-23T19:41:46","slug":"express-the-boiling-point-of-liquid-nitrogen-in-kelvin","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/23\/express-the-boiling-point-of-liquid-nitrogen-in-kelvin\/","title":{"rendered":"Express the boiling point of liquid nitrogen in Kelvin."},"content":{"rendered":"\n

Liquid nitrogen boils at -195.8 \u00b0C. Express the boiling point of liquid nitrogen in Kelvin.<\/p>\n\n\n\n

A) -77.4 K
B) 77.4 K
C) on the Kelvin scale, all temperatures are 0 K
D) -469.0 K
E) 469.0 K<\/p>\n\n\n\n

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

The correct answer is: B) 77.4 K<\/strong><\/p>\n\n\n\n

\n\n\n\n

<\/h3>\n\n\n\n

To convert temperatures from degrees Celsius (\u00b0C) to Kelvin (K), you use the following formula: K=\u00b0C+273.15K = \u00b0C + 273.15<\/p>\n\n\n\n

This conversion is based on the definition of the Kelvin scale, which starts at absolute zero<\/strong> (0 K), the point at which all molecular motion theoretically stops. Absolute zero corresponds to -273.15 \u00b0C. The Kelvin scale is commonly used in scientific contexts because it is an absolute temperature scale, meaning it does not use negative numbers for thermal energy.<\/p>\n\n\n\n

Let\u2019s apply the formula to the boiling point of liquid nitrogen: K=\u2212195.8+273.15=77.35\u224877.4\u2009KK = -195.8 + 273.15 = 77.35 \\approx 77.4 \\, \\text{K}<\/p>\n\n\n\n

So, the boiling point of liquid nitrogen is 77.4 K<\/strong>, making option B<\/strong> the correct answer.<\/p>\n\n\n\n

\n\n\n\n

Why the Other Choices Are Incorrect:<\/strong><\/h3>\n\n\n\n
    \n
  • A) -77.4 K<\/strong>: Incorrect. Kelvin temperatures are never negative because 0 K is the lowest possible temperature. You cannot have a temperature below absolute zero.<\/li>\n\n\n\n
  • C) On the Kelvin scale, all temperatures are 0 K<\/strong>: Incorrect. While 0 K is the lowest possible temperature (absolute zero), the Kelvin scale includes a wide range of temperatures above this point. For example, room temperature is about 293 K.<\/li>\n\n\n\n
  • D) -469.0 K<\/strong>: Incorrect. Again, Kelvin cannot be negative. Also, this is a confusing number\u2014perhaps referencing -469\u00b0F, which is closer to absolute zero in Fahrenheit.<\/li>\n\n\n\n
  • E) 469.0 K<\/strong>: Incorrect. This is far too high for the boiling point of liquid nitrogen. In fact, 469 K is about 195.9 \u00b0C above the freezing point of water.<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

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

    Understanding temperature scales is essential in scientific work. The Kelvin scale offers a practical and absolute measure of temperature that aligns with the laws of thermodynamics. Liquid nitrogen\u2019s boiling point of 77.4 K<\/strong> is a key example of applying this scale correctly.<\/p>\n\n\n\n

    \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

    Liquid nitrogen boils at -195.8 \u00b0C. Express the boiling point of liquid nitrogen in Kelvin. A) -77.4 KB) 77.4 KC) on the Kelvin scale, all temperatures are 0 KD) -469.0 KE) 469.0 K The Correct Answer and Explanation is: The correct answer is: B) 77.4 K To convert temperatures from degrees Celsius (\u00b0C) to Kelvin […]<\/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-218463","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/218463","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=218463"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/218463\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=218463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=218463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=218463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}