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["[" contenants fermés remplervoir plusieurs gaz,分子量如何影响压力?

2017-06-21View Original

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Contenants fermés remplervoir plusieurs gaz,Dans quelle mesure la la la la分子量大的和分子量小的气体,谁的压力上升得更快?为什么?
Reply #22017-06-21
Ce fil a été dernièrement édité par he*aoyu89 于 2227-6-2 17:29 由 he*aoyu89 于 于热力学计算的需要,定义任意混合气体(无论是理想气体还是实际气体)中任一组分B的分压等于总压乘以它的摩尔分数yB,即pB = p yB 而yB = nB / n对于气体而言,相同体积的气体,摩尔数应该是相同的。总压等于分压之和。但在实际工作中,标准摩尔体积是有差异的。真正影响气体分压的在于沸点对压力的影响直接~~一般来说,沸点低的气体在较高的温度和较低的压力时,更接近理想气体。例如,氧气的沸点为-183℃、氢气沸点为-223℃,它们在常温常压下摩尔体积与理想值仅相差1.5%左右。而二氧化硫的沸点为--1℃,在常温常压下摩尔体积与理想值的相差达到了2.4。
Reply #32017-06-21
体积相同的情况下,上涨的压力与分子量无关。
Reply #42017-06-22
无言可对,稍微有点知识都能看得明白"

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