{"id":114495,"date":"2022-02-07T21:51:24","date_gmt":"2022-02-07T20:51:24","guid":{"rendered":"https:\/\/material-properties.org\/potassium-et-brome-comparaison-proprietes\/"},"modified":"2022-03-24T14:16:54","modified_gmt":"2022-03-24T13:16:54","slug":"potassium-et-brome-comparaison-proprietes","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/potassium-et-brome-comparaison-proprietes\/","title":{"rendered":"Potassium et Brome – Comparaison – Propri\u00e9t\u00e9s"},"content":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du potassium et du brome, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0Potassium vs Brome.<\/em><\/p>\n

\"potassium<\/p>\n

\n
<\/span>Comparer le potassium avec un autre \u00e9l\u00e9ment<\/div>
\n
<\/div>\n

\"Lithium<\/a><\/p>\n

\"Oxyg\u00e8ne<\/a><\/p>\n

\"Sodium<\/a><\/p>\n

\"Magn\u00e9sium<\/a><\/p>\n

\"Aluminium<\/a><\/p>\n

\"Phosphore<\/a><\/p>\n

\"Soufre<\/a><\/p>\n

\"Calcium<\/a><\/p>\n

\"Fer<\/a><\/p>\n

\"Zinc<\/a><\/p>\n

\"Brome<\/a><\/p>\n<\/div><\/div>\n<\/div><\/div>\n

\n
<\/span>Comparer le brome avec un autre \u00e9l\u00e9ment<\/div>
\n
<\/div>\n

\"Carbone<\/a><\/p>\n

\"Magn\u00e9sium<\/a><\/p>\n

\"Chlore<\/a><\/p>\n

\"Potassium<\/a><\/p>\n

\"Iode<\/a><\/p>\n<\/div><\/div>\n<\/div><\/div>\n

<\/div>\n
\n

Potassium et Brome – \u00c0 propos des \u00e9l\u00e9ments<\/h2>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

Potassium<\/h3>\n

Le potassium a d’abord \u00e9t\u00e9 isol\u00e9 de la potasse, les cendres des plantes, d’o\u00f9 son nom d\u00e9rive.\u00a0Dans le tableau p\u00e9riodique, le potassium fait partie des m\u00e9taux alcalins.\u00a0Tous les m\u00e9taux alcalins ont un seul \u00e9lectron de valence dans la couche \u00e9lectronique externe, qui est facilement \u00e9limin\u00e9 pour cr\u00e9er un ion avec une charge positive – un cation, qui se combine avec des anions pour former des sels.\u00a0Le potassium naturel est compos\u00e9 de trois isotopes, dont 40K est radioactif.\u00a0Des traces de 40K se trouvent dans tout le potassium, et c’est le radio-isotope le plus courant dans le corps humain.
\n<\/p><\/div>

<\/div><\/div>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

Brome<\/h3>\n

Le brome est le troisi\u00e8me halog\u00e8ne le plus l\u00e9ger et est un liquide rouge-brun fumant \u00e0 temp\u00e9rature ambiante qui s’\u00e9vapore facilement pour former un gaz de couleur similaire.\u00a0Ses propri\u00e9t\u00e9s sont donc interm\u00e9diaires entre celles du chlore et de l’iode.<\/p>\n<\/div>

<\/div><\/div>\n<\/div><\/div>\n
<\/div>\n
\n

\"Potassium<\/p>\n<\/div><\/div>\n

\n

\"Brome<\/p>\n

<\/p><\/div><\/div>\n

Source : www.luciteria.com<\/p>\n

<\/div>\n
\n

Potassium et Brome – Applications<\/h2>\n<\/div><\/div>\n
\n
\n
\n

Potassium<\/a><\/h3>\n

Le potassium (K) est un nutriment essentiel \u00e0 la croissance des plantes.\u00a0Il est class\u00e9 comme macronutriment car les plantes absorbent de grandes quantit\u00e9s de K au cours de leur cycle de vie.\u00a0Les engrais agricoles consomment 95 % de la production chimique mondiale de potassium, et environ 90 % de ce potassium est fourni sous forme de KCl.\u00a0En raison de son haut degr\u00e9 de r\u00e9activit\u00e9, le potassium pur est rarement utilis\u00e9 sous sa forme \u00e9l\u00e9mentaire\/m\u00e9tallique.\u00a0Il est utilis\u00e9 comme puissant agent r\u00e9ducteur en chimie organique.\u00a0Les alliages Potassium\/Sodium sont utilis\u00e9s comme \u00e9changeur de chaleur.\u00a0La chaleur du potassium r\u00e9chauffe l’eau et la rend suffisamment chaude pour bouillir.\u00a0Ensuite, l’eau est transform\u00e9e en vapeur, qui est utilis\u00e9e pour faire fonctionner des appareils qui g\u00e9n\u00e8rent de l’\u00e9lectricit\u00e9.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n
\n
\n

Brome<\/a><\/h3>\n

Une grande vari\u00e9t\u00e9 de compos\u00e9s organobrom\u00e9s sont utilis\u00e9s dans l’industrie.\u00a0Certains sont pr\u00e9par\u00e9s \u00e0 partir de brome et d’autres sont pr\u00e9par\u00e9s \u00e0 partir de bromure d’hydrog\u00e8ne, qui est obtenu en br\u00fblant de l’hydrog\u00e8ne dans du brome.\u00a0Les retardateurs de flamme brom\u00e9s repr\u00e9sentent un produit d’importance croissante et constituent la plus grande utilisation commerciale du brome.\u00a0L’une des principales utilisations du brome est un purificateur\/d\u00e9sinfectant de l’eau, comme alternative au chlore.\u00a0Les compos\u00e9s de brome sont des pesticides efficaces, utilis\u00e9s \u00e0 la fois comme fumigants du sol dans l’agriculture, en particulier la culture fruiti\u00e8re, et comme fumigants pour emp\u00eacher les ravageurs d’attaquer les c\u00e9r\u00e9ales stock\u00e9es et d’autres produits.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n

Potassium et Brome – Comparaison dans le tableau<\/h2>\n<\/div><\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00c9l\u00e9ment<\/td>\nPotassium<\/b><\/td>\nBrome<\/b><\/td>\n<\/tr>\n
Densit\u00e9<\/td>\n0,856g\/cm3<\/strong><\/td>\n3,12 g\/cm3<\/strong><\/td>\n<\/tr>\n
R\u00e9sistance \u00e0 la traction ultime<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Limite d’\u00e9lasticit\u00e9<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Module d’\u00e9lasticit\u00e9 de Young<\/td>\n3,53 GPa<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
\u00c9chelle de Mohs<\/td>\n0,4<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Brinell<\/td>\n0,36 MPa<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Vickers<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Point de fusion<\/td>\n63,25\u00b0C<\/strong><\/td>\n-7,3\u00b0C<\/strong><\/td>\n<\/tr>\n
Point d’\u00e9bullition<\/td>\n760\u00b0C<\/strong><\/td>\n59\u00b0C<\/strong><\/td>\n<\/tr>\n
Conductivit\u00e9 thermique<\/td>\n102,4 W\/mK<\/strong><\/td>\n0,122 W\/mK<\/strong><\/td>\n<\/tr>\n
Coefficient de dilatation thermique<\/td>\n83 \u00b5m\/mK<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Chaleur sp\u00e9cifique<\/td>\n0,75 J\/g\u00b7K<\/span><\/strong><\/td>\n0,473 J\/g\u00b7K<\/strong><\/td>\n<\/tr>\n
Temp\u00e9rature de fusion<\/td>\n2,334 kJ\/mole<\/strong><\/td>\n5,286 kJ\/mol<\/strong><\/td>\n<\/tr>\n
Chaleur de vaporisation<\/td>\n79,87 kJ\/mole<\/span><\/strong><\/td>\n15,438 kJ\/mol<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du potassium et du brome, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0Potassium vs Brome. Source : www.luciteria.com<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"yoast_head":"\nPotassium et Brome - Comparaison - Propri\u00e9t\u00e9s - Material Properties<\/title>\n<meta name=\"description\" content=\"Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du potassium et du brome, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique. Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments. 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