一道英文版的化学题 急！

来源：百度知道 编辑：UC知道 时间：2024/05/14 05:04:21
some gas is collected over water at 20.0℃.the level of water inside and outside the gas-collection bottle are the same . the partral pressure of hydrogen is 742.5 torr
what is the barometric pressure at the time the gas is collceted?

答案是760.0 torr
我要答题过程

the water vapor is saturated in the gas-collection bottle. at 20.0℃, the saturated vapor pressure of water is 2309 Pa, that is 17.5 torr. thus, the barometric pressure, equal to the total pressure in the bottle, is (742.5+17.5=)760.0 torr.

水汽饱和，在气体收集瓶。在20.0 ℃时，饱和蒸气压的水是2309坝，即17.5 torr 。因此，气压，总额相等的压力，在瓶子里，是（ 742.5 17.5 = ） 760.0 torr