{"id":12245,"date":"2016-01-30T05:08:55","date_gmt":"2016-01-30T04:08:55","guid":{"rendered":"https:\/\/kamerpower.com\/?p=12245"},"modified":"2025-01-29T22:02:36","modified_gmt":"2025-01-29T21:02:36","slug":"sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique","status":"publish","type":"post","link":"https:\/\/kamerpower.com\/fr\/sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique\/","title":{"rendered":"Sujet Corrig\u00e9 Concours ENSP Yaounde 2013 Chimie et Physique"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69e59b7c9bb71\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #000000;color:#000000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #000000;color:#000000\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69e59b7c9bb71\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/kamerpower.com\/fr\/sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique\/#sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique-ecole-nationale-polytechnique-de-yaounde\" >Sujet Corrig\u00e9 Concours ENSP Yaounde 2013 Chimie et Physique\u00a0Ecole Nationale Polytechnique de Yaound\u00e9<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/kamerpower.com\/fr\/sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique\/#probleme-1\" >Probl\u00e8me\u00a01<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/kamerpower.com\/fr\/sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique\/#solution-au-probleme-1\" >Solution au probl\u00e8me 1\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/kamerpower.com\/fr\/sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique\/#probleme-2-%e2%80%93-sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique\" >Probl\u00e8me 2 &#8211;\u00a0Sujet Corrig\u00e9 Concours ENSP Yaounde 2013 Chimie et Physique<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/kamerpower.com\/fr\/sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique\/#solution-au-probleme-2-%e2%80%93-sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique\" >Solution au probl\u00e8me 2 &#8211;\u00a0Sujet Corrig\u00e9 Concours ENSP Yaounde 2013 Chimie et Physique<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/kamerpower.com\/fr\/sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique\/#sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique-ecole-nationale-polytechnique-de-yaounde-2\" >Sujet Corrig\u00e9 Concours ENSP Yaounde 2013 Chimie et Physique\u00a0Ecole Nationale Polytechnique de Yaound\u00e9<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"post-title single-title entry-title\" style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique-ecole-nationale-polytechnique-de-yaounde\"><\/span><span style=\"color: #ff0000;\"><strong>Sujet Corrig\u00e9 Concours ENSP Yaounde 2013 <a style=\"color: #ff0000;\" href=\"https:\/\/kamerpower.com\/fr\/concours-ensp-2015-ouverture-concours-dentree-en-premiere-annee-du-cycle-des-ingenieurs-de-conception-universite-de-yaounde-1\/\">Chimie et Physique\u00a0Ecole Nationale Polytechnique de Yaound\u00e9<\/a><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"probleme-1\"><\/span><span style=\"color: #3366ff;\">Probl\u00e8me\u00a01<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Sujet Corrig\u00e9 Concours ENSP Yaounde 2013 Chimie et Physiqu<\/strong>e: On r\u00e9alise la combustion compl\u00e8te de 2 moles de but\u00e8ne<\/span><\/p>\n<ol style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">Donner la formule d\u00e9velopp\u00e9e de ce corps,\u00a0<strong>\\Rightarrow<\/strong>\u00a0<span style=\"color: #3366ff;\">dire \u00e0 quelle famille d\u2019hydrocarbures il appartient<\/span>,\u00a0<strong>\\Rightarrow<\/strong>\u00a0<span style=\"color: #ff0000;\">dire quelle isom\u00e9trie il pr\u00e9sente<\/span> et\u00a0<strong>\\Rightarrow<\/strong>\u00a0<span style=\"color: #3366ff;\">donner les formules des diff\u00e9rentes isom\u00e8res en les nommant.<\/span><\/span><\/li>\n<li><span style=\"color: #000000;\">Ecrire l\u2019\u00e9quation \u00e9quilibr\u00e9e de la r\u00e9acton et calculer le volume de vapeur d\u2019eau produite mesur\u00e9e dans les conditions normales (volume molaire = 22,4 litres .<\/span><\/li>\n<li><span style=\"color: #000000;\">La totalit\u00e9 du gaz carbonique recueilli trouble l\u2019eau de chaux. Calculez la masse de carbonate de calcium form\u00e9e. kamerpower.com<\/span><\/li>\n<\/ol>\n<p style=\"text-align: justify;\"><span style=\"color: #ff0000;\">C = 12 g\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 H = 1 g\u00a0\u00a0\u00a0\u00a0 O = 16 g\u00a0\u00a0\u00a0 Ca = 40 g<\/span><\/p>\n<hr \/>\n<h3 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"solution-au-probleme-1\"><\/span><span style=\"color: #ff0000;\">Solution au probl\u00e8me 1\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"color: #000000;\"><span style=\"color: #3366ff;\">1)\u00a0<\/span>Formules d\u00e9velopp\u00e9es du but\u00e8ne<span style=\"color: #ff0000;\"> C<sub>4<\/sub>H<sub>8\u00a0<\/sub><\/span><\/span><\/p>\n<p><img decoding=\"async\" class=\" size-full wp-image-4570 aligncenter\" src=\"https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/04\/but-1-ene-et-but-2-ene.png\" alt=\"but-1-ene et but -2-ene\" width=\"493\" height=\"119\" srcset=\"https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/04\/but-1-ene-et-but-2-ene.png 493w, https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/04\/but-1-ene-et-but-2-ene-300x72.png 300w\" sizes=\"(max-width: 493px) 100vw, 493px\" \/><\/p>\n<ul>\n<li><span style=\"color: #000000;\">Il s\u2019agit d\u2019un alc\u00e8ne.<\/span><\/li>\n<li><span style=\"color: #000000;\">Il pr\u00e9sente une isom\u00e9trie de chaine.<\/span><\/li>\n<li><span style=\"color: #000000;\">Et autre isom\u00e8tre<\/span><\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\" size-full wp-image-4571 aligncenter\" src=\"https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/04\/isomer-de-but-1-ene.png\" alt=\"isom\u00e8tre de but-1-ene\" width=\"114\" height=\"67\" \/><\/p>\n<p><span style=\"color: #000000;\"><span style=\"color: #3366ff;\">2)<\/span> \u00a0Equaion:<\/span><\/p>\n<p>C4H8 + 6O2 =&gt; 4CO2 + 4H2O<\/p>\n<p>nC4H8 = nH2O\/4 =&gt; VH2O\/Vm \u00a0= 4nC4H8<\/p>\n<p>VH2O = 4VM.nC4H8 \u00a0=&gt; VH2O = 4&#215;22,4&#215;2 = 179,2<\/p>\n<p><span style=\"color: #000000;\"><span style=\"color: #3366ff;\">3)<\/span>\u00a0la masse de carbonate de calcium form\u00e9e:<\/span><\/p>\n<p><span style=\"color: #000000;\">\u00e9quation: \u00a0<\/span><\/p>\n<p>CO2 + CaO =&gt; CaCO3<\/p>\n<p>nCO2 = nCaCO3 =&gt; nCO2 = nC4H8<\/p>\n<p>(mCaCO3\/MCaCO3) = \u00a04nC4H8<\/p>\n<p>mCaCO = 4MCaCO3.nC4H8<\/p>\n<p>mCaCO3 = 0.8kg<\/p>\n<h3 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"probleme-2-%e2%80%93-sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique\"><\/span><strong><span style=\"color: #3366ff;\">Probl\u00e8me 2 &#8211;\u00a0<span style=\"color: #000000;\">Sujet Corrig\u00e9 Concours ENSP Yaounde 2013 Chimie et Physique<\/span><\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">Un \u00e9lectron p\u00e9n\u00e8tre entre les plaques d\u2019un condensateur \u00e0 \u00e9gale distance des deux plaques distantes de <span style=\"color: #ff0000;\">h = 1 cm<\/span> et soumises \u00e0 une<span style=\"color: #ff0000;\"> d.d.p<\/span> de <span style=\"color: #ff0000;\">200V<\/span> avec une vitesse initiale parall\u00e8le aux plaques\u00a0 <span style=\"color: #ff0000;\">v = 50 000 km\/s<\/span><\/span><\/p>\n<ol>\n<li style=\"text-align: justify;\"><span style=\"color: #000000;\">Sachant que les plaques du condensateur mesurent chacune<span style=\"color: #ff0000;\"> 5 cm<\/span> de longueur, calculez l\u2019ordonn\u00e9e\u00a0 <span style=\"color: #ff0000;\">y<sub>M <\/sub><\/span>de l\u2019\u00e9lectron juste \u00e0 la sortie du condensateur<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"color: #000000;\">Un \u00e9cran fluorescent est plac\u00e9 \u00e0 une distance <span style=\"color: #ff0000;\">d = 20 cm<\/span> du condensateur, calculez l\u2019ordonn\u00e9e <span style=\"color: #ff0000;\">y<sub>E<\/sub><\/span> de l\u2019impact de l\u2019\u00e9lectron sur\u00a0 l\u2019\u00e9cran.\u00a0<\/span><\/span>\u00a0<span style=\"color: #ff0000;\"> e = 1,6.10<\/span><sup><span style=\"color: #ff0000;\">-19 C<\/span> \u00a0<\/sup>\u00a0 , \u00a0 <span style=\"color: #ff0000;\">m<sub>e<\/sub> =0,9.10<sup>-30<\/sup>\u00a0 kg<\/span><\/li>\n<\/ol>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-4574\" src=\"https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/04\/Kamerpower-electron.png\" alt=\"l\u2019impact de l\u2019\u00e9lectron sur l\u2019\u00e9cran\" width=\"548\" height=\"261\" srcset=\"https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/04\/Kamerpower-electron.png 548w, https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/04\/Kamerpower-electron-300x143.png 300w\" sizes=\"(max-width: 548px) 100vw, 548px\" \/><\/p>\n<h3 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"solution-au-probleme-2-%e2%80%93-sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique\"><\/span><strong><span style=\"color: #ff0000;\">Solution au probl\u00e8me 2 &#8211;<span style=\"color: #000000;\">\u00a0Sujet Corrig\u00e9 Concours ENSP Yaounde 2013 Chimie et Physique<\/span><\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"color: #000000;\"><span style=\"color: #3366ff;\">1) <\/span>\u00a0Le principe fondamental de la dynamique donne<\/span><\/p>\n<p><span style=\"color: #000000;\">En projetant sur les axes on a \u00a0 <span style=\"color: #ff0000;\">mx = 0<\/span> \u00a0, <span style=\"color: #ff0000;\">my = eE<\/span> \u00a0et <span style=\"color: #ff0000;\">mz = 0<\/span><\/span><\/p>\n<p>x = 0\u00a0 <strong>\\Rightarrow<\/strong>\u00a0x = v <strong>\\Rightarrow<\/strong>\u00a0x = vt &#8212;&#8212;(1)<\/p>\n<p><strong>y=\\frac{eE}{m}\u00a0<\/strong>\\Rightarrow\u00a0<strong>y=\\frac{eE}{m}t<\/strong>\u00a0 \u00a0<strong> \\Rightarrow<\/strong><\/p>\n<p>Y = (eE\/2m)\/t^2\u00a0 &#8212;&#8212;&#8212;-(2)<\/p>\n<p><strong>t=\\frac{x}{v}\u00a0\\Rightarrow<\/strong><\/p>\n<p>Y = (eE\/2mv^2)\/x^2<\/p>\n<p>Pour <span style=\"color: #ff0000;\"><em>x = l \u00a0<span style=\"color: #000000;\">et\u00a0E=\\frac{U}{h}, \u00a0on a \u00a0<\/span><\/em><\/span><\/p>\n<p>YM = (eU\/2mhv^2)l2<\/p>\n<p>Donc :<\/p>\n<p>TM = [(1,6.10^-19) x 200 x (25.10^-4)] \/ \u00a02x(0,9.10^-3)x(10^-2)x2,5.10^-4)<\/p>\n<p>YM = 1,77&#215;10^-3m<\/p>\n<p><span style=\"color: #000000;\"><span style=\"color: #3366ff;\">2) <\/span>\u00a0Calcul de Y<sub>E<\/sub><\/span><\/p>\n<p>En\u00a0sortent\u00a0<strong>V_{{S}}<\/strong>:<\/p>\n<p>Vx = V, \u00a0vy = (eE\/m)ts \u00a0= (eEl\/mv)ts, vz =0<\/p>\n<p>la d\u00e9viation est<\/p>\n<p>tga = vy\/vy \u00a0= (eEl\/mv^2)<\/p>\n<p>YE = \u00a0[eUl(l\/2 + d)]\/ mv^2 h<\/p>\n<p>YE = 1,6m<\/p>\n<h3 class=\"post-title single-title entry-title\" style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"sujet-corrige-concours-ensp-yaounde-2013-chimie-et-physique-ecole-nationale-polytechnique-de-yaounde-2\"><\/span><span style=\"color: #3366ff;\"><strong><a style=\"color: #3366ff;\" href=\"https:\/\/kamerpower.com\/fr\/concours-enspt-yaounde-2015-2016-et-concours-rtcpt-buea-premiere-annee-et-deuxieme-annee-postes-et-telecommunications\/\">Sujet Corrig\u00e9 Concours ENSP Yaounde<\/a> 2013 Chimie et Physique\u00a0Ecole Nationale Polytechnique de Yaound\u00e9<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-5914\" src=\"\/\/kamerpower.com\/wp-content\/uploads\/2015\/05\/LogoENSP.jpg\" alt=\"ENSP Concours R\u00e9vision Cameroun\" width=\"289\" height=\"287\" srcset=\"https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/05\/LogoENSP-100x100.jpg 100w, https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/05\/LogoENSP-150x150.jpg 150w, https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/05\/LogoENSP-144x144.jpg 144w, https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/05\/LogoENSP-80x80.jpg 80w, https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/05\/LogoENSP-96x96.jpg 96w\" sizes=\"(max-width: 289px) 100vw, 289px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":5914,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[1701],"tags":[1712,1727,2078],"class_list":["post-12245","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-epreuves","tag-epreuve-de-concours-dentree-aux-grandes-ecoles-cameroun","tag-epreuve-ensp-concours-cameroun","tag-sujets-corrigees-concours-ensp-yaounde-polytechnique"],"_links":{"self":[{"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/posts\/12245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/comments?post=12245"}],"version-history":[{"count":1,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/posts\/12245\/revisions"}],"predecessor-version":[{"id":67830,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/posts\/12245\/revisions\/67830"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/media\/5914"}],"wp:attachment":[{"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/media?parent=12245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/categories?post=12245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/tags?post=12245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}