{"id":5608,"date":"2025-03-25T12:23:17","date_gmt":"2025-03-25T11:23:17","guid":{"rendered":"https:\/\/www.zsvltava.cz\/fyzika\/?p=5608"},"modified":"2025-03-26T08:03:37","modified_gmt":"2025-03-26T07:03:37","slug":"vypocet-tepla-horka-a-studena-voda","status":"publish","type":"post","link":"https:\/\/www.zsvltava.cz\/fyzika\/?p=5608","title":{"rendered":"V\u00fdpo\u010det tepla – hork\u00e1 a studen\u00e1 voda"},"content":{"rendered":"

Na\u0161\u00edm \u00fakolem bude porovnat teoretick\u00e9\/p\u0159edpov\u011bzen\u00e9 hodnoty s hodnotami re\u00e1ln\u00fdmi. Jak moc se li\u0161\u00ed? A pro\u010d vlastn\u011b?<\/strong><\/p>\n

    \n
  1. Vrouc\u00ed voda\n
      \n
    1. Jak\u00e1 je skute\u010dn\u00e1 teplota vrouc\u00ed vody?<\/li>\n
    2. O kolik procent se li\u0161\u00ed od 100\u00b0C?<\/li>\n<\/ol>\n<\/li>\n
    3. Studen\u00e1 voda\n
        \n
      1. Jak\u00e1 je teplota studen\u00e9 vody z kohoutku?\n
      2. Je rozd\u00edl mezi teplotou tekouc\u00ed vody a teplotou vody v n\u00e1dob\u011b?\n <\/ol>\n<\/li>\n
      3. Jak\u00e1 bude v\u00fdsledn\u00e1 teplota, kdy\u017e sm\u00edch\u00e1me 1 d\u00edl hork\u00e9 vody a 2 d\u00edly studen\u00e9?\n
          \n
        1. Zjisti v\u00fdpo\u010dtem.\n
        2. Ov\u011b\u0159 pokusem.\n
        3. Jak\u00fd je rozd\u00edl mezi v\u00fdpo\u010dtem a realitou?\n
        4. Vyj\u00e1d\u0159i rozd\u00edl v procentech.<\/li>\n<\/ol>\n
        5. Kolik studen\u00e9 vody bude pot\u0159eba pro ochlazen\u00ed 120 ml hork\u00e9 vody na 65\u00b0C?\n
            \n
          1. Vypo\u010d\u00edtej a zohledni ztr\u00e1ty (pou\u017eij procenta z p\u0159edchoz\u00edho kroku).<\/li>\n
          2. Ov\u011b\u0159 pokusem.<\/li>\n<\/ol>\n<\/ol>\n

            Pro spr\u00e1vn\u00e9 vy\u0159e\u0161en\u00ed si bude\u0161 muset zvolit objem.
            \nSami si ur\u010d\u00edte, jak velk\u00fd bude 1 d\u00edl.<\/p>\n

            Vzorec pro v\u00fdpo\u010det tepla:<\/h2>\n

            Q = m . c . (t2<\/sub> – t1<\/sub>)<\/p>\n

            Kde t1<\/sub> je po\u010d\u00e1te\u010dn\u00ed a t2<\/sub> je koncov\u00e1 teplota.<\/p>\n

            Pro v\u00fdm\u011bnu tepla plat\u00ed:<\/h3>\n

            m1<\/sub> . c1<\/sub> . (t – t1<\/sub>) = m2<\/sub> . c2<\/sub> . (t2<\/sub> – t)<\/p>\n

            Kde t1<\/sub> a t2<\/sub> jsou teploty t\u011bles a t je v\u00fdsledn\u00e1 teplota. Lev\u00e1 i prav\u00e1 \u010d\u00e1st rovnice zastupuj\u00ed v\u017edy jedno t\u011bleso.<\/p>\n

            Z rovnice je patrn\u00e9, \u017ee ve v\u00fdsledku mus\u00ed m\u00edt t\u011blesa stejnou tepelnou energii.<\/p>\n

            \n

            M\u011brn\u00e1 tepeln\u00e1 kapacita vody je 4,2 kJ\/kg.\u00b0C
            \nHustota vody je 997 kg\/m3<\/p>\n

            – Zad\u00e1n\u00ed ve form\u00e1tu PDF<\/a>
            \n–             Zad\u00e1n\u00ed ve form\u00e1tu DOCX<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

            Na\u0161\u00edm \u00fakolem bude porovnat teoretick\u00e9\/p\u0159edpov\u011bzen\u00e9 hodnoty s hodnotami re\u00e1ln\u00fdmi. Jak moc se li\u0161\u00ed? A pro\u010d vlastn\u011b? Vrouc\u00ed voda Jak\u00e1 je skute\u010dn\u00e1 teplota vrouc\u00ed vody? O …. <\/p>\n","protected":false},"author":1,"featured_media":5612,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43,50,56],"tags":[68],"class_list":["post-5608","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-priklady-pro-8-rocnik","category-teplo","category-teplota","tag-pracovni-list"],"_links":{"self":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/5608","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5608"}],"version-history":[{"count":0,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/5608\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/media\/5612"}],"wp:attachment":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}