Wl asked in 科學及數學其他 - 科學 · 1 decade ago

About evaporation

why warm air hold more water vapour than cold air ?

why some of water vapour will condense when the warm humid air suddenly cold ?

2 Answers

Rating
  • Chau
    Lv 5
    1 decade ago
    Favorite Answer

    1.It is because there should be enough energy to water,then the water will evaporate.In cold air the energy is lower,some vapour don't have enough energy,then they will condense to water.

    2.In cold air the energy is lower,some vapour don't have enough energy,then they will condense to water.

  • 1 decade ago

    我唔知你係就咁問定係題目黎

    但係我認為用中文有助你理解

    用最普通架冷縮熱脹為例子,當我依家有x cm^3架空氣,我將佢加熱,咁

    係咪會脹,咁依家個空氣架volumn係咪大過x cm^3,咁咪可以放多d野。

    咁如果空氣溫度下降,冷就會縮,咁依家空氣架volumn 係咪細過x cm^3

    咁咪放少左野。

    第二條呢,你可以諗下warm humid ,咁姐係空氣架水份都比較多,但

    係因為個天氣暖,所以每一粒架水molecule都可以有位企,但係當空氣

    特然變凍,咁俾佢地企架位係咪少左先?咁無計啦,水架molecule唯有逼

    少少一齊企,如此類推,本來一粒水molecule你見唔到,但依家因為太逼,

    無位企,所以逼埋逼埋逼左一粒大水molecule ,咁你咪見到。

    果如你係中三同學仔,以上理論已經足夠,當你學到change of state呢課

    你就會有更深了解,有咩唔明可以sd email俾我

    coolwindy312@yahoo.com.hk

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