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氧化物的熔点沸点大小比较

2025-04-03 20:39:25

推荐回答（3个）

回答1：

先看氧化物是离子（如H2O）还是共价化合物(如CaO)
一般离子氧化物的熔沸点高于共价化合物的熔沸点
如果都是共价化合物就比较相对分子质量，式量越大，融沸点越高
如果都是离子化合物就比较阳离子带的电荷数和阳离子半径，电荷数越多，半径越小，熔沸点越高

回答2：

对，氧化物的熔沸点较高。因为金属与氧气发生反应形成了离子键，而金属本身是通过金属键结合。离子键比金属键更坚固，需要更多的能量才可使离子键断开，从而熔沸点更高。

回答3：

晶格能大小

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