{"id":194625,"date":"2025-02-24T10:11:42","date_gmt":"2025-02-24T10:11:42","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=194625"},"modified":"2025-02-24T10:11:45","modified_gmt":"2025-02-24T10:11:45","slug":"a-slice-of-pizza-has-500-kcal","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/24\/a-slice-of-pizza-has-500-kcal\/","title":{"rendered":"A slice of pizza has 500 kcal"},"content":{"rendered":"\n<p>A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50-L container of cold water, what would be the approximate increase in the temperature of the water? (note; A Liter of cold water weighs about 1 kg) a. 500 C b. 50C c. 10C d.100C<br>\u00c3\u201a\u00c2<\/p>\n\n\n\n<p>A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50-L container of cold water, what would be the approximate increase in the temperature of the water?<\/p>\n\n\n\n<p>(note; A Liter of cold water weighs about 1 kg)<\/p>\n\n\n\n<p>a. 500 C<\/p>\n\n\n\n<p>b. 50C<\/p>\n\n\n\n<p>c. 10C<\/p>\n\n\n\n<p>d.100C<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>To determine the increase in temperature of the 50-L container of cold water when burning a 500 kcal slice of pizza, we use the specific heat capacity formula:<\/p>\n\n\n\n<p>[<br>Q = mc\\Delta T<br>]<\/p>\n\n\n\n<p>Where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>( Q ) is the heat energy in calories (500 kcal = 500,000 cal),<\/li>\n\n\n\n<li>( m ) is the mass of the water (50 L \u00d7 1 kg\/L = 50 kg),<\/li>\n\n\n\n<li>( c ) is the specific heat capacity of water (1 cal\/g\u00b0C = 1 kcal\/kg\u00b0C),<\/li>\n\n\n\n<li>( \\Delta T ) is the change in temperature (what we need to find).<\/li>\n<\/ul>\n\n\n\n<p>Rearranging the formula to solve for ( \\Delta T ):<\/p>\n\n\n\n<p>[<br>\\Delta T = \\frac{Q}{mc}<br>]<\/p>\n\n\n\n<p>Substituting the values:<\/p>\n\n\n\n<p>[<br>\\Delta T = \\frac{500,000}{50 \\times 1}<br>]<\/p>\n\n\n\n<p>[<br>\\Delta T = \\frac{500,000}{50}<br>]<\/p>\n\n\n\n<p>[<br>\\Delta T = 10\u00b0C<br>]<\/p>\n\n\n\n<p>Thus, the temperature of the water will increase by <strong>10\u00b0C<\/strong>, meaning the correct answer is:<\/p>\n\n\n\n<p><strong>c. 10\u00b0C<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Understanding the Energy Conversion:<\/strong><br>When we burn the pizza, it releases <strong>500 kcal<\/strong> of energy. This energy is absorbed by the 50 kg of water, causing its temperature to rise.<\/li>\n\n\n\n<li><strong>Why Water\u2019s Specific Heat Matters:<\/strong><br>Water has a high specific heat capacity (<strong>1 kcal\/kg\u00b0C<\/strong>), meaning it requires a significant amount of energy to change its temperature.<\/li>\n\n\n\n<li><strong>Why Other Answers Are Incorrect:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>500\u00b0C<\/strong>: This would require 25,000 kcal, which is far more than 500 kcal.<\/li>\n\n\n\n<li><strong>50\u00b0C<\/strong>: This would need 2,500 kcal, still too much energy.<\/li>\n\n\n\n<li><strong>100\u00b0C<\/strong>: Would need 5,000 kcal, unrealistic for just one slice of pizza.<\/li>\n<\/ul>\n\n\n\n<p>Therefore, the closest and most accurate answer is <strong>10\u00b0C<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>Now, I&#8217;ll generate an image related to this concept.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/02\/image-1390.png\" alt=\"\" class=\"wp-image-194626\"\/><\/figure>\n\n\n\n<p>Here is an educational illustration showing the concept of burning a slice of pizza to heat a 50-liter container of water by 10\u00b0C. Let me know if you need any modifications!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50-L container of cold water, what would be the approximate increase in the temperature of the water? (note; A Liter of cold water weighs about 1 kg) a. 500 C b. 50C c. 10C [&hellip;]<\/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-194625","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/194625","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=194625"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/194625\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=194625"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=194625"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=194625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}