{"id":754,"date":"2017-11-30T10:07:31","date_gmt":"2017-11-30T09:07:31","guid":{"rendered":"http:\/\/agora.xtec.cat\/escolaridolaina\/?p=754"},"modified":"2017-11-30T10:07:47","modified_gmt":"2017-11-30T09:07:47","slug":"experimentem-combustio","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/escolaridolaina\/general\/experimentem-combustio\/","title":{"rendered":"Experimentem: combusti\u00f3"},"content":{"rendered":"<p>Hem trobat tres productes: salfumant, alcohol i acetona. I una pregunta: Cremen?<\/p>\n<p>Ja tenim coneixements previs: &#8220;L&#8217;alcohol s&#8217;enc\u00e8n&#8221; &#8220;Si et poses alcohol a la m\u00e0 i l&#8217;encens,\u00a0 surt foc per\u00f2 no et cremes&#8221;.<\/p>\n<ul>\n<li>I doncs, qu\u00e8 crema m\u00e9s?<\/li>\n<\/ul>\n<p>Hem posat una mica d&#8217;alcohol i cremava. La flama surt blau.<\/p>\n<p>El salfuman no s&#8217;enc\u00e8n. El misto s&#8217;apaga de cop i surt com si fos gel.<\/p>\n<p>L&#8217;acetona s&#8217;enc\u00e8n molt: fa una flama que es veu m\u00e9s.<a href=\"http:\/\/agora.xtec.cat\/escolaridolaina\/wp-content\/uploads\/usu1606\/2017\/11\/IMG_3250.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-758 alignright\" src=\"http:\/\/agora.xtec.cat\/escolaridolaina\/wp-content\/uploads\/usu1606\/2017\/11\/IMG_3250.jpg\" alt=\"\" width=\"392\" height=\"294\" srcset=\"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-content\/uploads\/usu1606\/2017\/11\/IMG_3250.jpg 448w, https:\/\/agora.xtec.cat\/escolaridolaina\/wp-content\/uploads\/usu1606\/2017\/11\/IMG_3250-300x225.jpg 300w, https:\/\/agora.xtec.cat\/escolaridolaina\/wp-content\/uploads\/usu1606\/2017\/11\/IMG_3250-200x150.jpg 200w\" sizes=\"auto, (max-width: 392px) 100vw, 392px\" \/><\/a><a href=\"http:\/\/agora.xtec.cat\/escolaridolaina\/wp-content\/uploads\/usu1606\/2017\/11\/IMG_3251.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-759 alignright\" src=\"http:\/\/agora.xtec.cat\/escolaridolaina\/wp-content\/uploads\/usu1606\/2017\/11\/IMG_3251.jpg\" alt=\"\" width=\"221\" height=\"295\" srcset=\"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-content\/uploads\/usu1606\/2017\/11\/IMG_3251.jpg 336w, https:\/\/agora.xtec.cat\/escolaridolaina\/wp-content\/uploads\/usu1606\/2017\/11\/IMG_3251-225x300.jpg 225w\" sizes=\"auto, (max-width: 221px) 100vw, 221px\" \/><\/a><\/p>\n<p>HIP\u00d2TESI:\u00a0 &#8220;L&#8217;acetona \u00e9s m\u00e9s combustible que l&#8217;alcohol&#8221;.<\/p>\n<ul>\n<li>C\u00f3m ho podem comprovar?<\/li>\n<\/ul>\n<p>Posem la mateixa quantitat de l\u00edquid en un pot i comprovem quan triga cadascun a cremar-se del tot.<\/p>\n<p>OBSERVACI\u00d3:<\/p>\n<table style=\"height: 28px; width: 858px;\">\n<tbody>\n<tr>\n<td style=\"width: 210px;\">L\u00edquid<\/td>\n<td style=\"width: 327px;\"><strong>ALCOHOL\u00a0 (10 ml)<\/strong><\/td>\n<td style=\"width: 311px;\"><strong>ACETONA (10 ml)<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 210px;\">Temps que triga en cremar-se<\/td>\n<td style=\"width: 327px;\">4&#8217;15&#8221;36 (4min15seg)<\/td>\n<td style=\"width: 311px;\">\u00a02&#8217;16&#8243;15 (2min16seg)<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 210px;\">Observacions<\/td>\n<td style=\"width: 327px;\">&#8211; La flama \u00e9s m\u00e9s blava<\/p>\n<p>-L&#8217;alcohol s&#8217;ha apagat i ha quedat l\u00edquid.<\/td>\n<td style=\"width: 311px;\">&#8211; \u00a0Es veu m\u00e9s flama; \u00e9s m\u00e9s alta<\/p>\n<p>-L&#8217;acetona no ha deixat l\u00edquid<\/p>\n<p>-L&#8217;acetona ha cremat la tapa de llauna<\/p>\n<p>&nbsp;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>CONCLUSI\u00d3:<\/p>\n<ul>\n<li>L&#8217;acetona \u00e9s m\u00e9s inflamable.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>ENS APAREIX UNA NOVA PREGUNTA:<\/p>\n<p>Qu\u00e8 passa si barregem l&#8217;alcohol amb l&#8217;acetona?<\/p>\n<p>HIP\u00d2TESIS:<\/p>\n<ol>\n<li>Cremar\u00e0 m\u00e9s l&#8217;alcohol sol<\/li>\n<li>Cremar\u00e0 m\u00e9s l&#8217;acetona i l&#8217;alcohol junts que sols.<\/li>\n<\/ol>\n<p>QU\u00c8 FEM?<\/p>\n<p>Posem 5ml de cadascun (total 10ml) \u00e9s important que sigui la mateixa quantitat per poder comparar els temps.<\/p>\n<p>Triga: 4&#8217;06&#8243;98<\/p>\n<p>Observacions:<\/p>\n<p>-La flama era molt gran, vermella i blava.<\/p>\n<p>Conclusions:<\/p>\n<p>Ha trigat menys que l&#8217;acetona sola. El m\u00e9s inflamable \u00e9s l&#8217;acetona.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hem trobat tres productes: salfumant, alcohol i acetona. I una pregunta: Cremen? Ja tenim coneixements previs: &#8220;L&#8217;alcohol s&#8217;enc\u00e8n&#8221; &#8220;Si et poses alcohol a la m\u00e0 i l&#8217;encens,\u00a0 surt foc per\u00f2 no et cremes&#8221;. I doncs, qu\u00e8 crema m\u00e9s? Hem posat una mica d&#8217;alcohol i cremava. La flama surt blau. El salfuman no s&#8217;enc\u00e8n. El misto [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":759,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","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":"","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":"var(--ast-global-color-4)","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":[1],"tags":[],"class_list":["post-754","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-json\/wp\/v2\/posts\/754","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-json\/wp\/v2\/comments?post=754"}],"version-history":[{"count":3,"href":"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-json\/wp\/v2\/posts\/754\/revisions"}],"predecessor-version":[{"id":760,"href":"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-json\/wp\/v2\/posts\/754\/revisions\/760"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-json\/wp\/v2\/media\/759"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-json\/wp\/v2\/media?parent=754"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-json\/wp\/v2\/categories?post=754"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/escolaridolaina\/wp-json\/wp\/v2\/tags?post=754"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}