二氧化氮和四氧化二氮在物理性质和化学性质上有什么差别和共同点

2025-03-16 19:06:53
推荐回答(2个)
回答1:

二氧化氮是红棕色气体,四氧化二氮是无色气体。

1,二氧化氮是大π键结构的典型分子。大π键含有四个电子,其中两个进入二氧化氮分子结构成键π轨道,两个进入非键轨道。二氧化氮分子是V形分子、极性分子。
相对密度(水=1):1.45
相对蒸气密度(空气=1):3.2
饱和蒸气压(kPa):101.32(22℃)
临界温度(℃):158
临界压力(MPa):10.13
二氧化氮溶于水并与水反应生成硝酸或硝酸和一氧化氮。
2,N2O4是由二氧化氮叠合而成。其固体和液体及气体均无色。随着温度升高,二氧化氮增多,颜色加深,由褐色到赤红色。在大气压下,N2O4的沸点为21.2℃,熔点-11.2℃。密(20℃)1.446g/cm3。易与水反应生成等摩尔硝酸和亚硝酸混合物。当温度升高,亚硝酸分解为硝酸和氧化氮。是强氧化剂。其与氨混合,在低温下发生爆炸。N2O4与许多有机溶剂如酯、醚、酮、腈形成分子加合物。液体N2O4腐蚀某些金属(碱金属、碱土金属、锌、镉和汞等),生成金属盐,放出一氧化氮。

回答2:

二氧化氮红棕色气体,四氧化二氮无色
四氧化二氮密度为二氧化氮的2倍,
二氧化氮有氧化性,还原性,毒性,四氧化二氮基本相同
两分子二氧化氮转化为一分子四氧化二氮为不完全反应,存在反应平衡

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