{"id":8619,"date":"2023-09-02T14:18:00","date_gmt":"2023-09-02T13:18:00","guid":{"rendered":"https:\/\/exos.education\/fr\/exercice-sciences-reactions-chimiques-niveau-premiere\/"},"modified":"2023-08-21T14:54:21","modified_gmt":"2023-08-21T13:54:21","slug":"exercice-sciences-reactions-chimiques-niveau-premiere","status":"publish","type":"post","link":"https:\/\/exos.education\/fr\/exercice-sciences-reactions-chimiques-niveau-premiere\/","title":{"rendered":"Exercice Sciences R\u00e9actions Chimiques Niveau Premi\u00e8re"},"content":{"rendered":"<p>Points importants du cours :<\/p>\n<p>1)<img decoding=\"async\" draggable=false\" role=\"img\" class=\"emoji\" alt=\" \" src=\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/1f4da.svg\"> Une r\u00e9action chimique est un processus qui transforme une ou plusieurs substances en de nouvelles substances.<br \/>2)<img decoding=\"async\" draggable=\"false\" role=\"img\" class=\"emoji\" alt=\" \" src=\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/1f52c.svg\"> Ces transformations sont g\u00e9n\u00e9ralement accompagn\u00e9es par un changement d&rsquo;\u00e9nergie.<br \/>3)<img decoding=\"async\" draggable=\"false\" role=\"img\" class=\"emoji\" alt=\"\u2696\ufe0f\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/2696.svg\"> La loi de la conservation de la masse stipule que la masse totale des r\u00e9actifs doit \u00eatre \u00e9gale \u00e0 la masse totale des produits dans une r\u00e9action chimique.<\/p>\n<p>Consignes pour l&rsquo;exercice <img decoding=\"async\" draggable=\"false\" role=\"img\" class=\"emoji\" alt=\" \" src=\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/1f4dd.svg\">: <\/p>\n<p>Lisez attentivement chaque question et s\u00e9lectionnez une seule r\u00e9ponse. Si vous n&rsquo;\u00eates pas s\u00fbrrevenez en arri\u00e8re et revoyez les points importants du cours donn\u00e9s ci-dessus.<\/p>\n<p>Exercices &#8211; QCM : R\u00e9actions Chimiques<\/p>\n<p>1- Qu&rsquo;est-ce qu&rsquo;une r\u00e9action chimique?<br \/>A. Un ensemble de proc\u00e9d\u00e9s math\u00e9matiques<br \/>B. Une transformation qui cr\u00e9e des nouvelles substances<br \/>C. La conservation de l&rsquo;eau<\/p>\n<p>2- Que se passe-t-il g\u00e9n\u00e9ralement lors d&rsquo;une r\u00e9action chimique?<br \/>A. Aucun changement notable <br \/>B. Changement d&rsquo;\u00e9nergie<br \/>C. Les produits disparaissent<\/p>\n<p>3- Qu\u2019indique la loi de conservation de masse?<br \/>A. La gravit\u00e9 est constante<br \/>B: Le temps conserve sa quantit\u00e9<br \/>C: Le poids total avant et apr\u00e8s la r\u00e9action reste le m\u00eame <\/p>\n<p>R\u00e9ponses <img decoding=\"async\" draggable=\"false\" role=\"img\" class=\"emoji\" alt=\" \" src=\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/1f4d1.svg\">:<\/p>\n<p>1-B2-B3-C <\/p>\n<p>Ce test est parfait pour les \u00e9l\u00e8ves car il leur permettra non seulement d&rsquo;auto-\u00e9valuer leur compr\u00e9hension des concepts cl\u00e9s relatifs aux r\u00e9actions chimiques tout en s&rsquo;appuyant sur le contenu concis et pr\u00e9cis mentionn\u00e9 ci-dessusmais \u00e9galement plus largement sur leurs comp\u00e9tences en mati\u00e8re d&rsquo;analyse critique! <img decoding=\"async\" draggable=\"false\" role=\"img\" class=\"emoji\" alt=\" \" src=\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/1f604.svg\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Points importants du cours : 1)<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[56,8,5,4,318,1],"tags":[],"class_list":["post-8619","post","type-post","status-publish","format-standard","hentry","category-terminale","category-sciences","category-niveaux","category-matieres","category-pas-dadaptation-particuliere","category-exercices-pedagogiques-imprimables-et-gratuits"],"_links":{"self":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts\/8619","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/comments?post=8619"}],"version-history":[{"count":0,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts\/8619\/revisions"}],"wp:attachment":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/media?parent=8619"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/categories?post=8619"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/tags?post=8619"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}