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class="Nav w100"> <div id="zbbbnpu2h4x" class="Navlist w1000"> <ul> <li id="Top1"></li> </ul> <div id="zbbbnpu2h4x" class="clear"></div> </div> <div id="zbbbnpu2h4x" class="clear"></div> </div> <div id="zbbbnpu2h4x" class="clear"></div> </div> <div id="zbbbnpu2h4x" class="blockindex h450"> <div id="zbbbnpu2h4x" class="new9"> <div id="zbbbnpu2h4x" class="new91"> <h1>1公斤的液體氮?dú)饣降獨(dú)馐嵌嗌倭⒎矫?/h1> 發(fā)布時(shí)間：2024-08-11 </div> <div id="zbbbnpu2h4x" class="new92"> <div class="zbbbnpu2h4x" id="contentt"></div> 1公斤的液體氮?dú)饣降獨(dú)馐嵌嗌倭⒎矫住痘瘜W(xué)化工物性數(shù)據(jù)手冊(cè) 無(wú)機(jī)卷》p58上有液氮的密度；<br>氮的標(biāo)準(zhǔn)沸點(diǎn)是-195.8℃,液體密度0.808（-195.8℃），<br>1m3液氮可汽化成氮?dú)?br>808/28*22.4=646.4 標(biāo)立<br>1.周期系第ⅴ主族（氮族）元素。原子序數(shù)7。穩(wěn)定同位素：14，15。原子量14.0067。無(wú)色無(wú)臭氣體。氣體密度1.25046。相對(duì)密度：氣體0.96737（空氣=1），液體0.808（-195.8℃），固體1.026（-252℃）。熔點(diǎn)-209.86℃。沸點(diǎn)-195.8℃。主要化合價(jià)±3和±5。稍溶于水和乙醇?；瘜W(xué)性質(zhì)不活潑。<br>2.加熱時(shí)能與鋰、鎂、鈣、鈦等化合，在高溫下能直接與氧和氫化合。自然界中雷電發(fā)生時(shí)空氣中的氮和氧化合成一氧化氮，根瘤細(xì)菌也能在常溫常壓下使氮分子轉(zhuǎn)變?yōu)榈衔?。用于制硝酸、合成氨、氰氨（基）化鈣、請(qǐng)化物等，作為惰性氣體可用于填充燈泡和高溫計(jì)、貯藏食品或物料、保護(hù)易燃物質(zhì)及泡沫塑料中的發(fā)泡劑。<br>3.液氮可用作冷凍劑。氮約占空氣的4/5，也是組成動(dòng)植物體內(nèi)蛋白質(zhì)的成分。重要的礦物為硝酸鹽，如智利硝石nano3等。工業(yè)上用蒸發(fā)液態(tài)空氣的方法大規(guī)模制得氮。許多都采用化學(xué)模擬和生物模擬的方法進(jìn)行氮的固定。<br> <div class="zbbbnpu2h4x" id="contentb"></div> </div> <div id="zbbbnpu2h4x" class="clearfix"></div> </div> <div>上一個(gè)：<a href="n1169123.htm">DCS系統(tǒng)在甲醇裝置上的應(yīng)用</a><br /> 下一個(gè)：<a href="n1169121.htm">FX1002-0-3-H FX1002-4-3-H/A2記錄儀橫河</a> <br /><br /> <a href="n1168823.htm">鍋爐除塵器需要做好哪些維護(hù)保養(yǎng)</a><br /> <a href="n1168824.htm">演示win10關(guān)閉自動(dòng)更新方法是什么(演示win10關(guān)閉自動(dòng)更新方法有哪些)</a><br 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