{"id":115491,"date":"2022-04-25T05:22:35","date_gmt":"2022-04-25T04:22:35","guid":{"rendered":"https:\/\/material-properties.org\/helium-et-neon-comparaison-proprietes\/"},"modified":"2022-04-26T07:02:38","modified_gmt":"2022-04-26T06:02:38","slug":"helium-et-neon-comparaison-proprietes","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/helium-et-neon-comparaison-proprietes\/","title":{"rendered":"H\u00e9lium et N\u00e9on – Comparaison – Propri\u00e9t\u00e9s"},"content":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques de l’h\u00e9lium et du n\u00e9on, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0H\u00e9lium contre N\u00e9on.<\/em><\/p>\n

\"comparaison<\/p>\n

\n
<\/span>Comparer l'h\u00e9lium avec un autre \u00e9l\u00e9ment<\/div>
\n
<\/div>\n

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

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

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

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

\"N\u00e9on<\/a><\/p>\n

\"X\u00e9non<\/a><\/p>\n<\/div><\/div>\n<\/div><\/div>\n

\n
<\/span>Comparer le n\u00e9on avec un autre \u00e9l\u00e9ment<\/div>
\n
<\/div>\n

\"H\u00e9lium<\/a><\/p>\n

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

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

\"X\u00e9non<\/a><\/p>\n<\/div><\/div>\n<\/div><\/div>\n

<\/div>\n
\n

H\u00e9lium et N\u00e9on – \u00c0 propos des \u00e9l\u00e9ments<\/h2>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

H\u00e9lium<\/h3>\n

C’est un gaz monoatomique incolore, inodore, insipide, non toxique, inerte, le premier du groupe des gaz rares dans le tableau p\u00e9riodique.\u00a0Son point d’\u00e9bullition est le plus bas de tous les \u00e9l\u00e9ments.
\n<\/p><\/div>

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

N\u00e9on<\/h3>\n

Le n\u00e9on est un gaz monoatomique incolore, inodore et inerte dans des conditions standard, avec environ les deux tiers de la densit\u00e9 de l’air.
\n<\/p><\/div>

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

\"H\u00e9lium<\/p>\n<\/div><\/div>\n

\n

\"N\u00e9on<\/p>\n

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

Source\u00a0: www.luciteria.com<\/p>\n

<\/div>\n
\n

H\u00e9lium et N\u00e9on – Applications<\/h2>\n<\/div><\/div>\n
\n
\n
\n

H\u00e9lium<\/a><\/h3>\n

L’h\u00e9lium est utilis\u00e9 \u00e0 de nombreuses fins qui n\u00e9cessitent certaines de ses propri\u00e9t\u00e9s uniques, telles que son bas point d’\u00e9bullition, sa faible densit\u00e9, sa faible solubilit\u00e9, sa conductivit\u00e9 thermique \u00e9lev\u00e9e ou son inertie.\u00a0Sur la production mondiale totale d’h\u00e9lium en 2014 d’environ 32 millions de kg (180 millions de m\u00e8tres cubes standard) d’h\u00e9lium par an, la plus grande utilisation (environ 32 % du total en 2014) concerne les applications cryog\u00e9niques, dont la plupart impliquent le refroidissement des aimants supraconducteurs dans scanners IRM m\u00e9dicaux et spectrom\u00e8tres RMN.\u00a0La plupart des aimants cliniques sont des aimants supraconducteurs, qui n\u00e9cessitent de l’h\u00e9lium liquide pour les maintenir tr\u00e8s froids.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n
\n
\n

N\u00e9on<\/a><\/h3>\n

Le n\u00e9on est souvent utilis\u00e9 dans les enseignes et produit une lumi\u00e8re rouge\u00e2tre-orange incomparable.\u00a0Bien que les lampes \u00e0 tube avec d’autres couleurs soient souvent appel\u00e9es \u00ab\u00a0n\u00e9on\u00a0\u00bb, elles utilisent diff\u00e9rents gaz nobles ou des couleurs vari\u00e9es d’\u00e9clairage fluorescent.\u00a0Le n\u00e9on est \u00e9galement utilis\u00e9 pour fabriquer des indicateurs haute tension et des appareillages de commutation, des parafoudres, des \u00e9quipements de plong\u00e9e et des lasers.\u00a0Le n\u00e9on liquide est un r\u00e9frig\u00e9rant cryog\u00e9nique important.\u00a0Il a plus de 40 fois plus de puissance frigorifique par unit\u00e9 de volume que l’h\u00e9lium liquide et plus de 3 fois celle de l’hydrog\u00e8ne liquide<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n

H\u00e9lium et N\u00e9on – Comparaison dans le tableau<\/h2>\n<\/div><\/div>H\u00e9lium<\/p>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00c9l\u00e9ment<\/td>\nH\u00e9lium<\/strong><\/td>\nN\u00e9on<\/strong><\/td>\n<\/tr>\n
Densit\u00e9<\/td>\n0,00018 g\/cm3<\/strong><\/td>\n0,0009 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 de Young<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
\u00c9chelle de Mohs<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Brinell<\/td>\nN \/ A<\/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>\n-272,2 \u00b0C<\/strong><\/td>\n-248 \u00b0C<\/strong><\/td>\n<\/tr>\n
Point d’\u00e9bullition<\/td>\n-268,9 \u00b0C<\/strong><\/td>\n-248,7 \u00b0C<\/strong><\/td>\n<\/tr>\n
Conductivit\u00e9 thermique<\/td>\n0,1513 W\/mK<\/strong><\/td>\n0,0493 W\/mK<\/strong><\/td>\n<\/tr>\n
Coefficient de dilatation thermique<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Chaleur sp\u00e9cifique<\/td>\n5,193 J\/g\u00b7K<\/span><\/strong><\/td>\n0,904 J\/g\u00b7K<\/span><\/strong><\/td>\n<\/tr>\n
Temp\u00e9rature de fusion<\/td>\n0,0138 kJ\/mol<\/span><\/strong><\/td>\n0,3317 kJ\/mol<\/span><\/strong><\/td>\n<\/tr>\n
Chaleur de vaporisation<\/td>\n0,0845 kJ\/mol<\/span><\/strong><\/td>\n1,7326 kJ\/mol<\/span><\/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 de l’h\u00e9lium et du n\u00e9on, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0H\u00e9lium contre N\u00e9on. Source\u00a0: www.luciteria.com H\u00e9lium<\/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":"\nH\u00e9lium et N\u00e9on - 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 de l'h\u00e9lium et du n\u00e9on, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique. 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