{"id":10081,"date":"2018-04-19T10:45:34","date_gmt":"2018-04-19T03:45:34","guid":{"rendered":"https:\/\/example.com\/?p=10081"},"modified":"2023-12-12T12:15:41","modified_gmt":"2023-12-12T05:15:41","slug":"persamaan-termokimia-dan-jenis-perubahan-entalpi-standar","status":"publish","type":"post","link":"https:\/\/staging-blog.sirogu.com\/blog\/persamaan-termokimia-dan-jenis-perubahan-entalpi-standar","title":{"rendered":"Persamaan Termokimia dan Jenis Perubahan Entalpi Standar | Kimia Kelas 11"},"content":{"rendered":"<p><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Header%20blog%20RG\/Kimia_11.jpg\" alt=\"Kimia_11\" width=\"821\" height=\"410\" style=\"width: 821px; display: block; margin-left: auto; margin-right: auto;\"><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">RG Squad, ketika kamu mempelajari <strong>ilmu tentang perubahan kalor (panas) suatu zat yang melibatkan proses kimia dan fisika, maka disebut dengan termokimia<\/strong>. Nah, dari sini kita membutuhkan persamaan termokimia untuk menginformasikan reaksi tersebut khususnya yang terkait jumlah mol reaktan, produk, serta jumlah energi. Namun, tetap harus memperhatikan penulisan koefisien dan fase zatnya. Kenapa? Sebab akan mempengaruhi perubahan entalpi (\u29cb<\/span><i><span style=\"font-weight: 400;\">H<\/span><\/i><span style=\"font-weight: 400;\">). Wah, apa <\/span><i><span style=\"font-weight: 400;\">tuh<\/span><\/i><span style=\"font-weight: 400;\"> ya? Kita bahas bersama yuk!<\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><!--more--><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Entalpi adalah banyaknya energi yang dimiliki sistem (<\/span><i><span style=\"font-weight: 400;\">U<\/span><\/i><span style=\"font-weight: 400;\">) dan kerja (<\/span><i><span style=\"font-weight: 400;\">PV<\/span><\/i><span style=\"font-weight: 400;\">) sehingga bisa dituliskan <\/span><i><span style=\"font-weight: 400;\">H = U + PV<\/span><\/i><span style=\"font-weight: 400;\">. Sedangkan perubahan entalpi yaitu kalor reaksi dari suatu reaksi pada tekanan tetap. Supaya entalpi dapat dihitung, maka pengukurannya harus dilakukan pada suhu serta tekanan tertentu. Menurut para kimiawan, <strong>suhu 25\u00b0C dan tekanan 1 atm adalah ukuran yang tepat untuk menilai entalpi<\/strong>. <\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Suatu perubahan entalpi yang diukur dengan ukuran standar akan disebut perubahan entalpi standar. <strong>Satuannya bernama kilo Joule (kJ) dalam Sistem Internasional (SI)<\/strong>. Penulisan besarnya entalpi reaksi dalam persamaan reaksi dilakukan dengan dengan menuliskan simbol perubahan entalpi (\u29cbH) dibelakang persamaan reaksi. Misalnya:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">A(s) + B(aq) \u2192 C(aq) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u29cb<\/span><i><span style=\"font-weight: 400;\">H<\/span><\/i><span style=\"font-weight: 400;\"> = + <\/span><i><span style=\"font-weight: 400;\">x <\/span><\/i><span style=\"font-weight: 400;\">kJ<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Sampai di sini bisa dimengerti, Squad? Sekarang kita lanjut membahas antara termokimia dengan perubahan entalpi ya!<\/span><\/p>\n<p style=\"text-align: justify;\"><strong>Contoh:<\/strong><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-18%20at%2014.51.38.png\"><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Reaksi 1 merupakan pembakaran 1 mol gas CO dan reaksi 2 merupakan pembakaran 2 mol gas CO dengan \u29cb<\/span><i><span style=\"font-weight: 400;\">H<\/span><\/i><span style=\"font-weight: 400;\"> reaksi yang meripakan kelipatan koefisiennya.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><img decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-18%20at%2015.02.53.png\"><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><img decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-18%20at%2015.04.47.png\"><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Fase zat yang berbeda akan menghasilkan \u29cb<\/span><i><span style=\"font-weight: 400;\">H<\/span><\/i><span style=\"font-weight: 400;\"> yang berbeda pula.<\/span><\/p>\n<p style=\"text-align: justify;\"><strong>Jenis-jenis Perubahan Entalpi Standar<\/strong><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ada beberapa jenis perubahan entalpi standar, yaitu:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2016.10.21.png\" alt=\"Screen Shot 2018-04-19 at 16.10.21\" width=\"450\" height=\"24\" style=\"width: 450px;\"><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Bernama lain kalor pembentukan standar yang merupakan perubahan entalpi ketika 1 mol senyawa terbentuk dari unsur-unsurnya pada kondisi standar. <\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2016.06.47.png\" alt=\"Screen Shot 2018-04-19 at 16.06.47\" width=\"760\" height=\"39\" style=\"width: 760px;\"><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Persamaan termokimianya adalah:<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-18%20at%2015.56.11.png\"><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2016.05.35.png\" alt=\"Screen Shot 2018-04-19 at 16.05.35\" width=\"450\" height=\"25\" style=\"width: 450px;\"><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Merupakan perubahan entalpi jika 1 mol suatu zat terbakar sempurna pada kondisi standar.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2016.09.27.png\" alt=\"Screen Shot 2018-04-19 at 16.09.27\" width=\"565\" height=\"47\" style=\"width: 565px;\"><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Persamaan termokimianya adalah:<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-18%20at%2017.18.53.png\"><br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2015.58.37.png\" alt=\"Screen Shot 2018-04-19 at 15.58.37\" width=\"450\" height=\"22\" style=\"width: 450px;\"><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Dikenal dengan atomisasi unsur yang merupakan perubahan entalpi jika 1 mol berbentuk gas terbentuk dari unsur dalam bentuk fisik pada kondisi standar. Reaksi pengatoman akan memiliki <\/span><span style=\"font-weight: 400;\">\u29cb<\/span><i><span style=\"font-weight: 400;\">H <\/span><\/i><span style=\"font-weight: 400;\">positif (endoterm). Hal ini dikarenakan reaksi memerlukan energi untuk memisahkan atom-atom.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Contohnya, pengatoman unsur hidrogen. Persamaan termokimianya adalah:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><img decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-18%20at%2017.50.45.png\"><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2015.15.58.png\" alt=\"Screen Shot 2018-04-19 at 15.15.58\" width=\"515\" height=\"27\" style=\"width: 515px;\"><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Merupakan perubahan entalpi jika 1 mol senyawa diubah menjadi atom-atom dalam bentuk gas dalam keadaan standar.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Misalnya pengatoman metana (CH<\/span><span style=\"font-weight: 400;\">4<\/span><span style=\"font-weight: 400;\">), persamaan termokimianya sebagai berikut:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2013.49.10.png\" alt=\"Screen Shot 2018-04-19 at 13.49.10\" width=\"450\" height=\"40\" style=\"width: 450px;\"><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2015.13.05.png\" alt=\"Screen Shot 2018-04-19 at 15.13.05\" width=\"450\" height=\"27\" style=\"width: 450px;\"><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Perubahan entalpi apabila 1 mol senyawa diubah menjadi larutannya pada keadaan standar. <\/span><\/p>\n<p style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2015.07.27.png\" alt=\"Screen Shot 2018-04-19 at 15.07.27\" width=\"250\" height=\"44\" style=\"width: 250px;\"><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">NaOH(s) \u2192 NaOH(aq) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u29cb<\/span><i><span style=\"font-weight: 400;\">H<\/span><\/i><span style=\"font-weight: 400;\"> = +50 kJ<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2015.05.40.png\" alt=\"Screen Shot 2018-04-19 at 15.05.40\" width=\"450\" height=\"25\" style=\"width: 450px;\"><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Merupakan perubahan entalpi pada peleburan 1 mol zat padat menjadi zat cair pada titik leburnya dan tekanan standar. Misalnya peleburan es.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2014.10.33-1.png\" alt=\"Screen Shot 2018-04-19 at 14.10.33-1\" width=\"450\" height=\"34\" style=\"width: 450px;\"><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2015.04.06.png\" alt=\"Screen Shot 2018-04-19 at 15.04.06\" width=\"450\" height=\"25\" style=\"width: 450px;\"><br \/><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Perubahan entalpi pada penguapan 1 mol zat cair menjadi gas pada titik didihnya dan tekanan standar. Misal penguapan air dan persamaan termokimianya sebagai berikut:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Screen%20Shot%202018-04-19%20at%2014.15.26.png\" alt=\"Screen Shot 2018-04-19 at 14.15.26\" width=\"450\" height=\"45\" style=\"width: 450px;\"><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Nah, dari banyak contoh yang sudah dijelaskan di atas, masih ada bagian yang belum kamu mengerti, Squad? Tuliskan di kolom komentar ya! Ayo semangat belajar dan pakai <\/span><a href=\"http:\/\/bit.ly\/rg_app\" rel=\"noopener\" target=\"_blank\"><strong>ruangbelajar<\/strong><\/a><span style=\"font-weight: 400;\"> untuk membantumu memahami tentang persamaan termokimia dan perubahan entalpi standar ya!<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-weight: 400;\"><a href=\"https:\/\/link.ruangguru.com\/blPk\/eaff0eb9\" target=\"_blank\" style=\"text-align: center;\" class=\"rg-cta\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/cta\/1f6a4f8b-0326-42d1-bc9c-111ebb100e56.jpeg\" width=\"650\" height=\"228\" alt=\"ruangbelajar\" \/><\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>RG Squad, ketika kamu mempelajari ilmu tentang perubahan kalor (panas) suatu zat yang melibatkan proses kimia dan fisika, maka disebut dengan termokimia. Nah, dari sini kita membutuhkan persamaan termokimia untuk menginformasikan reaksi tersebut khususnya yang terkait jumlah mol reaktan, produk, serta jumlah energi. Namun, tetap harus memperhatikan penulisan koefisien dan fase zatnya. Kenapa? Sebab akan [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":10081,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_knawatfibu_url":["https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Header%20blog%20RG\/Kimia_11.jpg"],"_edit_last":["1"],"_edit_lock":["1702358141:1"]},"categories":[548,550],"tags":[31,34,10,37],"class_list":["post-10081","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kimia","category-kimia-sma-kelas-11","tag-kelas-11","tag-kimia-xi","tag-konsep-pelajaran","tag-sma"],"aioseo_notices":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Persamaan Termokimia dan Jenis Perubahan Entalpi Standar | Kimia Kelas 11 - Belajar Gratis di Rumah Kapan Pun! | Blog Ruangguru<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/staging-blog.sirogu.com\/blog\/persamaan-termokimia-dan-jenis-perubahan-entalpi-standar\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Persamaan Termokimia dan Jenis Perubahan Entalpi Standar | Kimia Kelas 11 - Belajar Gratis di Rumah Kapan Pun! | Blog Ruangguru\" \/>\n<meta property=\"og:description\" content=\"RG Squad, ketika kamu mempelajari ilmu tentang perubahan kalor (panas) suatu zat yang melibatkan proses kimia dan fisika, maka disebut dengan termokimia. Nah, dari sini kita membutuhkan persamaan termokimia untuk menginformasikan reaksi tersebut khususnya yang terkait jumlah mol reaktan, produk, serta jumlah energi. Namun, tetap harus memperhatikan penulisan koefisien dan fase zatnya. Kenapa? 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