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生动地讲述他的一项实验


“不幸,他以为结束了没有进一步的研究和深入的探索。当lemery将一根燃烧的蜡烛移入瓶口时,突然传来一阵尖锐的crack啪声,lemery大吃一惊。铁屑很快被溶解了,解决方案中冒出很多气泡。它的意思是“水源”。在他的论点中解释产生“可燃气体”的各种方法,指出不仅可以通过铁与硫酸的相互作用来制备,然后用铁 锌 tin and hydrochloric acid,or the interaction of tin, zinc and sulfuric acid will produce this gas.he first determined that this gas could not support the breathing of animals,if you mix it with air in advance,a violent explosion occurs when ignited.

in addition,cavendish also did a number of quantitative experiments.he found,with a certain amount of a certain metal and a sufficient amount of various acids,the amount of "flammable air" produced is fixed.he also measured the ignition of "flammable air" mixed with ordinary air,the volume ratio that produces the maximum explosive force,and measured the size of the sound during the explosion.

but,although cavendish specializes in "flammable air",but why does it explode when igniting this gas,and what are the products of combustion,but i can't answer.

in 1776,french chemist marco,pass the "flammable air" produced by the reaction of zinc and dilute sulfuric acid through a thin tube,ignite after export,and place a small porcelain plate above the flame.he was expecting black ashes to appear on the porcelain plate,for research.but the results of the experiment disappointed him greatly.there is no trace of smoke on the porcelain plate,but there were small water droplets.regrettably,ma ke didn't think about where the water drop came from.then gave up.

lucky and sensitive lavoisier repeated marco's experiment in 1783.he ignites "flammable air" in oxygen,also got water.lavoisier did not let go of this phenomenon,he was keenly aware,water may be the product of the combination of "flammable air" and oxygen.he thought again,can the water be broken down into its original components?为了证明我的假设,lavoisier开始了一项新实验。他把铁屑放在拆开的枪管中,将枪管放在火炉上加热,让水蒸气通过机筒的一端,在另一端真正收集到“易燃空气”。艾美酒店非常激动,知道我有一个新发现,他称这种可燃气体为“可燃气体”。

。他很快发现,烛光被“炸掉”,但是烧瓶中的气体燃烧了,瓶口像火炬一样花了一个刻钟。他产生了纯净的“可燃空气”,研究了它的特性测量它的密度并明确指出,这是与空气不同的气体,但是他没有为这种气体选择一个更准确的名字。

在1766年,卡文迪什发表了有关“可燃气体”的特别讨论。当他摇动纸上枪管中的铁屑时,发现铁屑已变成铁和氧的化合物。通过这种方式, 拉瓦锡确定了水与“可燃空气”之间的关系。至今,氢是人们真正认可的。拉瓦锡再次考虑,“易燃空气”能否通过红色氧化铁,喝水实验结果再次满足了他的愿望。

一旦,lemery将装有350ml 1:4稀硫酸的烧瓶放在火炉上加热,然后将40克铁屑放入热硫酸溶液中几次。 在1700年,在法国巴黎科学院,着名的化学家lemery站在舞台上,面对许多听众,生动地讲述他的一项实验。

在1787年,lavoisier已确定“易燃空气”-氢气的新的正确名称。简单来说,那是:

水+铁→铁和氧化合物+“易燃空气”

从实验的角度来看,水已经含有“易燃空气”。

事情还没有结束。

对这种气体的第一个认真研究是卡文迪许, 一位热衷于实验的英国化学家