{"id":31668,"date":"2025-06-22T07:37:01","date_gmt":"2025-06-22T07:37:01","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=31668"},"modified":"2025-06-22T07:37:02","modified_gmt":"2025-06-22T07:37:02","slug":"what-is-the-temperature-of-a-system-in-thermal-equilibrium-with-another-system-made-up-of-water-and-steam-at-one-atmosphere-of-pressure","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/what-is-the-temperature-of-a-system-in-thermal-equilibrium-with-another-system-made-up-of-water-and-steam-at-one-atmosphere-of-pressure\/","title":{"rendered":"What is the temperature of a system in thermal equilibrium with another system made up of water and steam at one atmosphere of pressure"},"content":{"rendered":"\n<p>What is the temperature of a system in thermal equilibrium with another system made up of water and steam at one atmosphere of pressure? a. 0\u00b0F b. 273 K c. 0 K d. 100\u00b0C<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n<p><strong>Correct Answer: d. 100\u00b0C<\/strong><\/p>\n\n\n\n<p>When a system is in <strong>thermal equilibrium<\/strong> with a mixture of <strong>liquid water and steam<\/strong> at <strong>one atmosphere (1 atm)<\/strong> of pressure, its temperature is <strong>100 degrees Celsius (\u00b0C)<\/strong>.<\/p>\n\n\n\n<p>At 1 atm of pressure, water <strong>boils at 100\u00b0C<\/strong>. This temperature remains <strong>constant<\/strong> during the phase transition between <strong>liquid and vapor<\/strong>. Even though energy is continuously added to convert the water into steam, the <strong>temperature does not increase<\/strong> until the entire liquid has turned into vapor. This is a key property of phase transitions at constant pressure.<\/p>\n\n\n\n<p>Thermal equilibrium means two systems in contact do not exchange net heat energy because they are at the same temperature. So, if one system is in contact with water-steam mixture at 1 atm and reaches thermal equilibrium, it must be at <strong>exactly 100\u00b0C<\/strong>, the boiling point of water under those conditions.<\/p>\n\n\n\n<p>This principle is a foundational concept in thermodynamics. It is used in <strong>calibration<\/strong> of thermometers and other temperature-sensing instruments. The <strong>triple point and boiling point of water<\/strong> serve as reliable fixed reference temperatures.<\/p>\n\n\n\n<p>Now let\u2019s evaluate the incorrect choices:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>a. 0\u00b0F<\/strong> is approximately -17.78\u00b0C, which is much colder than boiling water and not in equilibrium with steam at atmospheric pressure.<\/li>\n\n\n\n<li><strong>b. 273 K<\/strong> is equal to 0\u00b0C, the freezing point of water, not the boiling point.<\/li>\n\n\n\n<li><strong>c. 0 K<\/strong> is absolute zero, the lowest possible temperature, where all molecular motion ceases. It is physically impossible to reach and certainly not in equilibrium with a boiling mixture.<\/li>\n<\/ul>\n\n\n\n<p>Therefore, the only correct temperature for a system in thermal equilibrium with a boiling water-steam mixture at 1 atm is <strong>100\u00b0C<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is the temperature of a system in thermal equilibrium with another system made up of water and steam at one atmosphere of pressure? a. 0\u00b0F b. 273 K c. 0 K d. 100\u00b0C The correct answer and explanation is: Correct Answer: d. 100\u00b0C When a system is in thermal equilibrium with a mixture of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31668","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/31668","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=31668"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/31668\/revisions"}],"predecessor-version":[{"id":31669,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/31668\/revisions\/31669"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=31668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=31668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=31668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}