Anonymous
Anonymous asked in 科學化學 · 1 decade ago

化學問題 (英文好的比較適合進來)

1. The partial pressure of water vapor in saturated air at 20 degree Celcius is 0.0230 atm.

(a) How many molecules of water are in 1.00 cm3 of saturated air at 20 degree Celcius?

(b) What volume of saturated air at 20 degree Celcius contains 0.500 mol of water?

謝謝!

:)

1 Answer

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  • Leonis
    Lv 5
    1 decade ago
    Favorite Answer

    (a) 假設氣體符合理想氣體方程式,所以PV=nRT,水蒸氣壓力為0.023atm,體積為0.001L,溫度為293K,所以0.023*0.001=n*0.082*293,n=9.57*10^ -7(mol)

    (b)溫度與壓力不變,所以體積比為莫耳數比,0.001/ V=9.57*10^ -7/0.5,V=522.47(L)

    Source(s): me
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