{"id":81692,"date":"2023-05-28T22:43:21","date_gmt":"2023-05-28T14:43:21","guid":{"rendered":"https:\/\/ocw.nycu.edu.tw\/?post_type=course_page&#038;p=81692"},"modified":"2026-06-01T15:45:23","modified_gmt":"2026-06-01T07:45:23","slug":"3-4-work-3-5-heat","status":"publish","type":"course_page","link":"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/college-of-engineering\/thermodynamics-i-108-academic-year-department-of-mechanical-engineering-prof-yao-hsien-liu\/3-4-work-3-5-heat","title":{"rendered":"3.4 Work, 3.5 Heat"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"81692\" class=\"elementor elementor-81692\">\n\t\t\t\t\t\t\t\t\t<section class=\"penci-section penci-disSticky penci-structure-10 elementor-section elementor-top-section elementor-element elementor-element-16700d17 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"16700d17\" data-element_type=\"section\">\n\t\t\t\t\t\t<div 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data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.13.3 - 28-05-2023 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-default\">3.4 Work, 3.5 Heat\n<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7aec5b11 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100%;-webkit-mask-repeat:var(--divider-pattern-repeat);mask-repeat:var(--divider-pattern-repeat);background-color:var(--divider-color);-webkit-mask-image:var(--divider-pattern-url);mask-image:var(--divider-pattern-url)}.elementor-widget-divider--no-spacing{--divider-pattern-size:auto}.elementor-widget-divider--bg-round{--divider-pattern-repeat:round}.rtl .elementor-widget-divider .elementor-divider__text{direction:rtl}.e-con-inner>.elementor-widget-divider,.e-con>.elementor-widget-divider{width:var(--container-widget-width,100%);--flex-grow:var(--container-widget-flex-grow)}<\/style>\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-da19150 elementor-widget elementor-widget-shortcode\" data-id=\"da19150\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-shortcode\">\n<table id=\"tablepress-181\" class=\"tablepress tablepress-id-181\">\n<thead>\n<tr class=\"row-1 odd\">\n\t<th class=\"column-1\">Week<\/th><th class=\"column-2\">Course Content<\/th><th class=\"column-3\">Course Video<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-hover\">\n<tr class=\"row-2 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">Introduction, Definition and Scope of Thermodynamics<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=62994\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-3 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">Chap. 1 Zeroth law of Thermodynamic<br \/>\n1.1 Thermodynamic system<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81632\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-4 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">1.2 Macroscopic and Microscopic<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81638\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-5 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">1.3 Properties and states of substance<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81644\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-6 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">1.4 Process and cycle<br \/>\n1.5 Units<br \/>\n1.6 Specific volume and density<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81650\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-7 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">1.7 Absolute pressure and Gauge pressure<br \/>\n1.8 Energy<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81656\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-8 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">1.9-1.11 Properties of a pure substance<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81662\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-9 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">Chap.2 Pure substance properties<br \/>\n2.1-2.3 Pure substance behavior<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81668\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-10 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">2.4 Temperature<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81674\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-11 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">2.5 Two phase state<br \/>\n2.6 Solid and Liquid<br \/>\n2.7 Superheated vapor<br \/>\n2.8 Ideal gas<br \/>\n2.9 Compressibility factor<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81680\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-12 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">Chap.3 First Law of Thermodynamics<br \/>\n3.1-3.2 The energy equation<br \/>\n3.3 Definition of work<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81686\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-13 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">3.4 Work<br \/>\n3.5 Heat<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81692\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-14 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">3.6 Heat transfer<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81698\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-15 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">3.7 Internal energy<br \/>\n3.8 Problem analysis and solution technique<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81704\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-16 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">3.10 Specific heat<br \/>\n3.11 Ideal gas (u\u3001h\u3001c)<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81710\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-17 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">3.13 Transient process<br \/>\n3.14 General system that involve work<br \/>\nChap.4 Energy equation for a control volume<br \/>\n4.1 Conservation of mass<br \/>\n4.2 The energy equation for control volume<br \/>\n4.3 Steady state process<br \/>\n4.4 Steady flow devices<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81716\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-18 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">4.4 Steady flow devices<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81722\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-19 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">4.4 Steady flow devices<br \/>\n4.6 Transient (unsteady) process<br \/>\nChap.5 Second law of thermodynamics<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81728\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-20 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">5.1 Heat engine<br \/>\n5.2 Refrigerator<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81734\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-21 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">5.2 Refrigerator<br \/>\n5.3 Reversible process<br \/>\n5.4 Factors that render processes irreversible<br \/>\n5.5 Carnot cycle<br \/>\n5.6 Carnot principles<br \/>\n5.7-5.8 Temperature scale(Kelvin)<br \/>\n5.9 Ideal vs Real machine<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81740\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-22 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">5.9 Ideal vs Real machine<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81746\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-23 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">5.10 Clausius inequality<br \/>\nChap.6 Entropy<br \/>\n6.1 Definition of Entropy<br \/>\n6.2 Entropy of a pure substance<br \/>\n6.3 Entropy change in reversible process<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81752\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-24 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">6.4 Thermodynamic property relation<br \/>\n6.5 Entropy change of a solid or liquid<br \/>\n6.6 Entropy change of an ideal gas<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81758\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-25 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">6.7 Polytropic process<br \/>\n6.8 Entropy change of a control mass during irreversible process<br \/>\n6.9-6.10 Entropy generation in Entropy equation<br \/>\n6.11 Entropy as a rate equation<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81764\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-26 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">7.3 Steady state single-flow process<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81770\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-27 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">7.3 Steady state single-flow process<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81776\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-28 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">7.4 Principle of the increase of entropy<br \/>\n7.5 Efficiency (Isentropic efficiency)<br \/>\nChap.8 Exergy<br \/>\n8.1 Available energy, reversible work and irreversibility<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81782\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-29 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">8.1 Available energy, reversible work and irreversibility<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81788\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-30 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">8.2 Exergy<br \/>\n8.3 Second law efficiency<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81794\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-31 odd\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">8.2 Exergy<br \/>\n8.3 Second law efficiency<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81800\">Watch Online<\/a><\/td>\n<\/tr>\n<tr class=\"row-32 even\">\n\t<td class=\"column-1\"><\/td><td class=\"column-2\">8.4 Exergy balance equation<\/td><td class=\"column-3\"><a href=\"\/?post_type=course_page&amp;p=81806\">Watch Online<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-181 from cache 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href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/course-of-chinese-center\" class=\"elementor-item\">Course of Chinese Center<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-120431\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/liberal-arts-college\" class=\"elementor-item\">Forum Of Liberal Arts<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-123746\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/speech-of-general-education-center\" class=\"elementor-item\">Contemporary Civilization<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-128240\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/reading-of-classic-masterpiece\" class=\"elementor-item\">Reading of Classic Masterpiece<\/a><\/li>\n<li class=\"menu-item 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menu-item-5374\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/college-of-biological-science-and-technology\" class=\"elementor-item\" tabindex=\"-1\">College of Engineering Bioscience<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-5379\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/college-of-humanities-and-social-sciences\" class=\"elementor-item\" tabindex=\"-1\">College of Humanities Arts and Social Sciences<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-5378\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/college-of-hakka-affair-culture\" class=\"elementor-item\" tabindex=\"-1\">College of Hakka Affair Culture<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-118070\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/school-of-law\" class=\"elementor-item\" tabindex=\"-1\">School of Law<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-118069\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/school-of-nursing-2\" class=\"elementor-item\" tabindex=\"-1\">School of Nursing<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-118071\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/college-of-photonics\" class=\"elementor-item\" tabindex=\"-1\">College of Photonics<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-125874\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/college-of-biomedical-science-and-engineering\" class=\"elementor-item\" tabindex=\"-1\">College of Biomedical Science and Engineering<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-132738\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/college-of-life-sciences-en\" class=\"elementor-item\" tabindex=\"-1\">College of Life Sciences<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-141797\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/colege-of-medicine-en\" class=\"elementor-item\" tabindex=\"-1\">College of Medicine<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-118072\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/course-of-chinese-center\" class=\"elementor-item\" tabindex=\"-1\">Course of Chinese Center<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-120431\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/liberal-arts-college\" class=\"elementor-item\" tabindex=\"-1\">Forum Of Liberal Arts<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-123746\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/speech-of-general-education-center\" class=\"elementor-item\" tabindex=\"-1\">Contemporary Civilization<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-128240\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/reading-of-classic-masterpiece\" class=\"elementor-item\" tabindex=\"-1\">Reading of Classic Masterpiece<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-course_page ajax-mega-menu menu-item-123745\"><a href=\"https:\/\/ocw.nycu.edu.tw\/?course_page=all-course-2\/course-of-general-education-center-2\" class=\"elementor-item\" tabindex=\"-1\">Course of General Education Center<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>3.4 Work, 3.5 &hellip;<\/p>\n","protected":false},"featured_media":0,"parent":62982,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","format":"standard","meta":{"footnotes":""},"categories":[2922],"tags":[],"class_list":["post-81692","course_page","type-course_page","status-publish","format-standard","hentry","category-thermodynamics-i-108-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>3.4 Work, 3.5 Heat - NYCU OCW<\/title>\n<meta name=\"description\" content=\"3.4 Work, 3.5 Heat   https:\/\/youtu.be\/Bqf0fGrYT6g      Back to Course Homepage       COURSE\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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