{"id":3857,"date":"2023-01-09T10:41:22","date_gmt":"2023-01-09T10:41:22","guid":{"rendered":"https:\/\/7thclass.deltapublications.in\/?page_id=3857"},"modified":"2024-12-12T04:54:09","modified_gmt":"2024-12-12T04:54:09","slug":"s-8-c-air-expands-on-heating","status":"publish","type":"page","link":"https:\/\/7thclass.deltapublications.in\/index.php\/s-8-c-air-expands-on-heating\/","title":{"rendered":"S-8.c Air Expands On Heating"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Air expands on heating<\/strong><\/h2>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-e229bb62ab2e1e53d8c15809ee2f6ed2\" style=\"color:#000060\"><strong>Introduction<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Definition<\/strong>: Air is a mixture of gases that occupy space and exert pressure.<\/li>\n\n\n\n<li><strong>Expansion<\/strong>: When air is heated, its particles move faster and spread apart, causing it to occupy more space.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-7200dcd21dfab09688027e9900b2f329\" style=\"color:#000060\"><strong>Concept of Air Expansion<\/strong><\/h4>\n\n\n\n<ol class=\"wp-block-list has-large-font-size\">\n<li><strong>Particle Movement<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Heat increases the kinetic energy of air particles.<\/li>\n\n\n\n<li>Particles move more vigorously, overcoming attractive forces between them.<\/li>\n\n\n\n<li>This results in expansion.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Density Decrease<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Heated air becomes less dense than cooler air around it.<\/li>\n\n\n\n<li>This is why hot air rises (e.g., hot air balloons).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Thermal Expansion<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Air expands when heated and contracts when cooled.<\/li>\n\n\n\n<li>This property is common in gases due to the large spaces between particles.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-664d27e5b0072158be692b1864c06f4f\" style=\"color:#000060\"><strong>Experiments to Observe Air Expansion<\/strong><\/h4>\n\n\n\n<ol class=\"wp-block-list has-large-font-size\">\n<li><strong>Balloon Experiment<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Attach a balloon to the mouth of an empty bottle.<\/li>\n\n\n\n<li>Place the bottle in hot water.<\/li>\n\n\n\n<li><strong>Observation<\/strong>: The balloon inflates as air inside the bottle expands.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Bottle and Straw Experiment<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Insert a straw through the lid of a bottle and seal it with clay.<\/li>\n\n\n\n<li>Heat the bottle gently.<\/li>\n\n\n\n<li><strong>Observation<\/strong>: Air bubbles escape through the straw, indicating expansion.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-a6e90e68dd173feee5c60f3a8b121e3b\" style=\"color:#000060\"><strong>Everyday Examples<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Hot Air Balloons<\/strong>: Hot air rises, allowing the balloon to float.<\/li>\n\n\n\n<li><strong>Cooking Pots<\/strong>: Steam (heated air and water vapor) expands, lifting lids.<\/li>\n\n\n\n<li><strong>Tyres<\/strong>: Air pressure in tyres increases on hot days due to expansion.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-985ceb8f61b75216d33e1f8fa0b61a8a\" style=\"color:#000060\"><strong>Applications of Air Expansion<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Weather Patterns<\/strong>: Heated air expands, creating low-pressure zones that influence wind.<\/li>\n\n\n\n<li><strong>Thermometers<\/strong>: The air inside expands to show temperature changes.<\/li>\n\n\n\n<li><strong>Engines<\/strong>: Combustion of fuel heats air, creating expansion that powers movement.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\"><strong>Let&#8217;s practice!<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/81513\/842\/657\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-35.png\" alt=\"\" class=\"wp-image-5946\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-35.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-35-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-35-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-35-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/81666\/601\/578\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-30.png\" alt=\"\" class=\"wp-image-5947\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-30.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-30-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-30-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-30-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Air expands on heating Introduction Concept of Air Expansion Experiments to Observe Air Expansion Everyday Examples Applications of Air Expansion Let&#8217;s practice!<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"footnotes":""},"class_list":["post-3857","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3857","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3857"}],"version-history":[{"count":14,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3857\/revisions"}],"predecessor-version":[{"id":15238,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3857\/revisions\/15238"}],"wp:attachment":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}