由于你没有给出初始和压入真空瓶后两种状态的温度,我们认为这是等温过程,
(1)根据P1V1=P2V2可得,P2=P1V1/V2,
氢气分压:P=99.8×150÷250=59.88KPa
氧气分压:P=46.6×275÷250=51.26KPa
氮气分压:P=33.3×250÷250=33.3KPa
(2)总压P=59.88+51.26+33.3=144.44KPa
(3)由于三种气体的温度一样,体积一样,根据PV=nRT,摩尔分数与各自的分压成正比,即
氢气摩尔分数:X=59.88÷144.44=41.46%
氧气摩尔分数:X=51.26÷144.44=35.49%
氮气摩尔分数:X=33.3÷144.44=23.05%
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