{"id":89377,"date":"2025-06-01T10:03:23","date_gmt":"2025-06-01T10:03:23","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89377"},"modified":"2025-06-01T10:03:23","modified_gmt":"2025-06-01T10:03:23","slug":"steam-at-100c-is-more-effective-in-heating-than-water-at-the-same-tem","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/steam-at-100c-is-more-effective-in-heating-than-water-at-the-same-tem\/","title":{"rendered":"Steam at 100\u00b0C is more effective in heating than water at the same tem"},"content":{"rendered":"

Steam at 100\u00b0C is more effective in heating than water at the same temperature because<\/p>\n

[amp_mcq option1=”steam is in the gaseous state and water is in the liquid state” option2=”steam has an additional heat known as ‘latent heat of vaporization'” option3=”water has hydrogen bonds but steam does not” option4=”transfer of heat from steam is easier than water” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2011<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct option is B. Steam at 100\u00b0C is more effective in heating than water at 100\u00b0C because steam possesses additional energy in the form of latent heat of vaporization. This is the energy absorbed by water to change its state from liquid to gas at its boiling point (100\u00b0C) without a change in temperature. When steam comes into contact with a cooler surface, it condenses back into water at 100\u00b0C, releasing this large amount of latent heat, which is then transferred to the surface being heated. Water at 100\u00b0C does not have this stored latent heat to release upon changing state.
\n<\/section>\n
\nThe question asks why steam at the same temperature as water is a more efficient heating medium. The key concept is latent heat.
\n<\/section>\n
\nThe latent heat of vaporization of water at 100\u00b0C is approximately 2260 kJ\/kg (or 540 cal\/g). This means that condensing 1 kg of steam at 100\u00b0C to water at 100\u00b0C releases 2260 kJ of heat, which is significantly more than the heat released by simply cooling 1 kg of water from 100\u00b0C. This large amount of heat released upon condensation makes steam very effective for heating applications like steam engines, industrial processes, and steam burns.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Steam at 100\u00b0C is more effective in heating than water at the same temperature because [amp_mcq option1=”steam is in the gaseous state and water is in the liquid state” option2=”steam has an additional heat known as ‘latent heat of vaporization’” option3=”water has hydrogen bonds but steam does not” option4=”transfer of heat from steam is easier … <\/p>\n

Detailed SolutionSteam at 100\u00b0C is more effective in heating than water at the same tem<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1085],"tags":[1465,1130,1128],"class_list":["post-89377","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1465","tag-heat-and-thermodynamics","tag-physics","no-featured-image-padding"],"yoast_head":"\nSteam at 100\u00b0C is more effective in heating than water at the same tem<\/title>\n<meta name=\"description\" content=\"The correct option is B. Steam at 100\u00b0C is more effective in heating than water at 100\u00b0C because steam possesses additional energy in the form of latent heat of vaporization. This is the energy absorbed by water to change its state from liquid to gas at its boiling point (100\u00b0C) without a change in temperature. When steam comes into contact with a cooler surface, it condenses back into water at 100\u00b0C, releasing this large amount of latent heat, which is then transferred to the surface being heated. Water at 100\u00b0C does not have this stored latent heat to release upon changing state. The question asks why steam at the same temperature as water is a more efficient heating medium. The key concept is latent heat.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/steam-at-100c-is-more-effective-in-heating-than-water-at-the-same-tem\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Steam at 100\u00b0C is more effective in heating than water at the same tem\" \/>\n<meta property=\"og:description\" content=\"The correct option is B. Steam at 100\u00b0C is more effective in heating than water at 100\u00b0C because steam possesses additional energy in the form of latent heat of vaporization. This is the energy absorbed by water to change its state from liquid to gas at its boiling point (100\u00b0C) without a change in temperature. When steam comes into contact with a cooler surface, it condenses back into water at 100\u00b0C, releasing this large amount of latent heat, which is then transferred to the surface being heated. Water at 100\u00b0C does not have this stored latent heat to release upon changing state. The question asks why steam at the same temperature as water is a more efficient heating medium. The key concept is latent heat.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/steam-at-100c-is-more-effective-in-heating-than-water-at-the-same-tem\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:03:23+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Steam at 100\u00b0C is more effective in heating than water at the same tem","description":"The correct option is B. Steam at 100\u00b0C is more effective in heating than water at 100\u00b0C because steam possesses additional energy in the form of latent heat of vaporization. This is the energy absorbed by water to change its state from liquid to gas at its boiling point (100\u00b0C) without a change in temperature. When steam comes into contact with a cooler surface, it condenses back into water at 100\u00b0C, releasing this large amount of latent heat, which is then transferred to the surface being heated. Water at 100\u00b0C does not have this stored latent heat to release upon changing state. The question asks why steam at the same temperature as water is a more efficient heating medium. The key concept is latent heat.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/steam-at-100c-is-more-effective-in-heating-than-water-at-the-same-tem\/","og_locale":"en_US","og_type":"article","og_title":"Steam at 100\u00b0C is more effective in heating than water at the same tem","og_description":"The correct option is B. Steam at 100\u00b0C is more effective in heating than water at 100\u00b0C because steam possesses additional energy in the form of latent heat of vaporization. This is the energy absorbed by water to change its state from liquid to gas at its boiling point (100\u00b0C) without a change in temperature. When steam comes into contact with a cooler surface, it condenses back into water at 100\u00b0C, releasing this large amount of latent heat, which is then transferred to the surface being heated. Water at 100\u00b0C does not have this stored latent heat to release upon changing state. The question asks why steam at the same temperature as water is a more efficient heating medium. The key concept is latent heat.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/steam-at-100c-is-more-effective-in-heating-than-water-at-the-same-tem\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:03:23+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/steam-at-100c-is-more-effective-in-heating-than-water-at-the-same-tem\/","url":"https:\/\/exam.pscnotes.com\/mcq\/steam-at-100c-is-more-effective-in-heating-than-water-at-the-same-tem\/","name":"Steam at 100\u00b0C is more effective in heating than water at the same tem","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:03:23+00:00","dateModified":"2025-06-01T10:03:23+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct option is B. Steam at 100\u00b0C is more effective in heating than water at 100\u00b0C because steam possesses additional energy in the form of latent heat of vaporization. This is the energy absorbed by water to change its state from liquid to gas at its boiling point (100\u00b0C) without a change in temperature. When steam comes into contact with a cooler surface, it condenses back into water at 100\u00b0C, releasing this large amount of latent heat, which is then transferred to the surface being heated. Water at 100\u00b0C does not have this stored latent heat to release upon changing state. The question asks why steam at the same temperature as water is a more efficient heating medium. 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