为什么真金不怕火炼?

2025-04-06 13:03:03
推荐回答(4个)
回答1:

真金不怕火炼,亦作“ 真金不怕火 ”。比喻正确的事物经得住考验。 语出然 《艳阳天》第一一五章:“乌云遮不住太阳,真金不怕火炼, 东山坞 永远会是太阳当空,永远是我们人民的天下!”.高晓声 《大好人江坤大》:“姓 刘 的说要调查,你就陪他去,真金不怕火,查好了!”
其化学原理是:
真金不怕火炼并不是指火烧不化金子,因为金子的熔点确实不高。但是金的化学稳定性很高,不容易与其他物质发生化学反应,不必担心会氧化变色。即使是在熔融状态下也不会氧化变色,冷却后照样金光闪闪。同时金在熔融状态下的挥发也很少,可忽略不计。所以,金子即使是烧化了,冷却后得到的金块还和烧前的金子颜色重量相同,没有氧化丢失。
但是铜铁等其他金属虽然熔点比金高,但化学稳定性就远不如金子了,常温下就会氧化,即使没有达到熔化温度,在高温状态氧化反应的程度就会大大增加。冷却后肯定变色,去掉氧化物重量肯定不如烧之前了。

回答2:

那是一种错误的认知,金的熔点要低于好多金属,你把金子放进铁锅里用火烧是会熔化的,但是铁还没有熔化。
目前已知熔点最高的金属是钨。

回答3:

看熔点,那是温度还没达到金的熔点,温度够高自然就融了,还有就句话就是个说法表达了有真本事经得住考验

回答4:

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