{"id":749,"date":"2026-03-29T09:00:43","date_gmt":"2026-03-29T07:00:43","guid":{"rendered":"https:\/\/yb-isn.fr\/2025\/spc\/?p=749"},"modified":"2026-04-08T08:44:25","modified_gmt":"2026-04-08T06:44:25","slug":"65","status":"publish","type":"post","link":"https:\/\/yb-isn.fr\/2025\/spc\/?p=749","title":{"rendered":"66-R\u00e9actions chimiques forc\u00e9es (pas encore trait\u00e9)"},"content":{"rendered":"\n<p>Revoir les r\u00e9actions chimiques spontan\u00e9es avant de d\u00e9marrer<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"http:\/\/yb-isn.fr\/spe-physique-2020\/wp-content\/uploads\/2021\/02\/image-2-1024x273.png\" alt=\"\" class=\"wp-image-718\" style=\"width:401px;height:auto\"\/><\/figure>\n\n\n<p><!--more--><\/p>\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"http:\/\/yb-isn.fr\/spe-physique-2020\/wp-content\/uploads\/2021\/02\/image-3.png\" alt=\"\" class=\"wp-image-720\"\/><\/figure>\n\n\n\n<p class=\"has-white-color has-accent-background-color has-text-color has-background has-link-color has-medium-font-size wp-elements-d97943bb7724a8a939e9207ed2ce1fc0\"> Introduction<\/p>\n\n\n\n<p><em>Les exercices sont ceux du livre Hatier Terminale enseignement de sp\u00e9cialit\u00e9<\/em>.<\/p>\n\n\n\n<p><em>Les vid\u00e9os propos\u00e9es peuvent vous donner des id\u00e9es de sujets pour le grand oral.<\/em><\/p>\n\n\n\n<p>Pr\u00e9requis page 234<\/p>\n\n\n\n<p>Qcm&nbsp;:<a href=\"http:\/\/hatier-clic.fr\/pct234\">http:\/\/hatier-clic.fr\/pct234<\/a><\/p>\n\n\n\n<p>R\u00e9visions et \u00e9chauffements pages 236-237<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/yb-isn.fr\/spe-physique-2020\/wp-content\/uploads\/2020\/08\/ligne-de-s\u00e9paration-page-des-ongles.png\" alt=\"\" class=\"wp-image-88\"\/><\/figure>\n\n\n\n<p>Dans une r\u00e9action chimique spontan\u00e9e le m\u00e9lange r\u00e9actionnel  \u00e9volue sans apport d&rsquo;\u00e9nergie en se rapprochant de l&rsquo;\u00e9tat d&rsquo;\u00e9quilibre.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"http:\/\/yb-isn.fr\/spe-physique-2020\/wp-content\/uploads\/2021\/02\/image-1.png\" alt=\"\" class=\"wp-image-716\" style=\"width:494px;height:203px\"\/><\/figure>\n\n\n\n<p>Nous avons vu l&rsquo;exemple de la pile dans lequel une r\u00e9action chimique spontan\u00e9e d\u2019oxydor\u00e9duction produit un courant \u00e9lectrique ( gr\u00e2ce au transfert d&rsquo;\u00e9lectrons ) dans un circuit ext\u00e9rieur. <\/p>\n\n\n\n<p>Une question se pose : un chimiste peut-il forcer un syst\u00e8me chimique \u00e0 \u00e9voluer dans le sens contraire de son \u00e9volution spontan\u00e9e ?<\/p>\n\n\n\n<p>L\u2019\u00e9lectrolyse est un exemple de transformation forc\u00e9e.<\/p>\n\n\n\n<p class=\"has-white-color has-accent-background-color has-text-color has-background has-link-color has-medium-font-size wp-elements-9e9186557756d152cd39899ef4f6f5ba\">1) L&rsquo;\u00e9lectrolyse<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/yb-isn.fr\/2024\/spc\/wp-content\/uploads\/2025\/04\/image.png\" alt=\"\" class=\"wp-image-770\"\/><\/figure>\n\n\n\n<p class=\"has-vivid-cyan-blue-color has-text-color\">Exercice r\u00e9solu page 246<\/p>\n\n\n\n<p class=\"has-white-color has-accent-background-color has-text-color has-background has-link-color has-medium-font-size wp-elements-cfe19e561b4902a10f64888c8de403d1\">2) \u00c9tude quantitative<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/yb-isn.fr\/spe-physique-2020\/wp-content\/uploads\/2021\/02\/image-1024x515.png\" alt=\"\" class=\"wp-image-692\"\/><\/figure>\n\n\n\n<p class=\"has-vivid-cyan-blue-color has-text-color\">Exercice r\u00e9solu page 247<\/p>\n\n\n\n<p class=\"has-white-color has-accent-background-color has-text-color has-background has-link-color has-medium-font-size wp-elements-e0cac1b52be60e176b89da071a91d409\">3) Stockage et conversion d&rsquo;\u00e9nergie chimique<\/p>\n\n\n<p>De nombreux dispositifs permettent de convertir et stocker l&rsquo;\u00e9nergie chimiques .Les piles ,les accumulateurs ,les organismes chlorophylliens.<\/p>\n<p>Ci dessous des exemples avec les enjeux soci\u00e9taux associ\u00e9s<\/p>\n<p><strong>Accumulateur au plomb (batterie de voiture)<\/strong><\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/H1FAbf9GM8Q\" allowfullscreen=\"allowfullscreen\" width=\"200\" height=\"150\" frameborder=\"0\"><\/iframe><\/p>\n<\/p>\n<hr>\n<p><strong>batterie de t\u00e9l\u00e9phone, pc portable&#8230;<\/strong><\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/ocIUSLtN5wI\" allowfullscreen=\"allowfullscreen\" width=\"200\" height=\"150\" frameborder=\"0\"><\/iframe><\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/b0akFUh6vgA\" allowfullscreen=\"allowfullscreen\" width=\"200\" height=\"150\" frameborder=\"0\"><\/iframe><\/p>\n<hr>\n<p><strong>La pile \u00e0 combustible<\/strong><\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/Mo1lWqjJgkw\" allowfullscreen=\"allowfullscreen\" width=\"200\" height=\"150\" frameborder=\"0\"><\/iframe><\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.edumedia-sciences.com\/fr\/media\/frame\/952\/?auth=0a622fa5366b65df9a7eab65527a24aa\/23383\" width=\"200\" height=\"150\" frameborder=\"0\"><\/iframe><\/p>\n<p>pour aller plus loin :Comment produire le dihydrog\u00e8ne ?<\/p>\n<\/p>\n<figure><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/_sqYx8K_m9c\" allowfullscreen=\"allowfullscreen\" width=\"200\" height=\"150\"><\/iframe><\/figure>","protected":false},"excerpt":{"rendered":"<p>Revoir les r\u00e9actions chimiques spontan\u00e9es avant de d\u00e9marrer<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-749","post","type-post","status-publish","format-standard","hentry","category-non-classe"],"_links":{"self":[{"href":"https:\/\/yb-isn.fr\/2025\/spc\/index.php?rest_route=\/wp\/v2\/posts\/749","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yb-isn.fr\/2025\/spc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yb-isn.fr\/2025\/spc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yb-isn.fr\/2025\/spc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yb-isn.fr\/2025\/spc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=749"}],"version-history":[{"count":7,"href":"https:\/\/yb-isn.fr\/2025\/spc\/index.php?rest_route=\/wp\/v2\/posts\/749\/revisions"}],"predecessor-version":[{"id":792,"href":"https:\/\/yb-isn.fr\/2025\/spc\/index.php?rest_route=\/wp\/v2\/posts\/749\/revisions\/792"}],"wp:attachment":[{"href":"https:\/\/yb-isn.fr\/2025\/spc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=749"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yb-isn.fr\/2025\/spc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=749"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yb-isn.fr\/2025\/spc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=749"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}