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dengzuyu木虫 (著名写手)
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[交流]
请教挥发量(度)的计算公式
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哪位虫子知道液体的挥发量(度)的计算公式,比如是水溶液的挥发除了与温度,液体表面积有关外,与溶液的体积有关吗??? 望赐告~! |
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westwolf
木虫 (著名写手)
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看看下面几个网站的信息 Evaporation of water Evaporation is the process where a liquid, in this case water changes from a liquid to a gaseous state. It is a misconception that at 1 atm, water vapor only exists at 100 °C. Water molecules are in a constant state of evaporation and condensation flux near the surface of liquid water. If a surface molecule receives enough energy, it will leave the liquid and turn into vapour pending an allowable vapor pressure. Under a pressure of 1 atm, water will boil at 100 °C. The ratio of the heat loss from a pond by evaporation to the heat loss due to convection, independent of windspeed, is given by:  where Qc,pa is the heat loss from the pond by convection, in W/(m2·K), Qe is the heat loss from the pond by evaporation, in W/(m2·K), Tp and Ta are the Kelvin (or Celsius) temperatures of the water and air, and Pwp and Pa are the vapor pressures of the pond surface and air, and p is the barometric pressure, with all pressures in mm Hg. (Bowen, 1926) http://www.grow.arizona.edu/Grow ... .php?ResourceId=208 http://www.newton.dep.anl.gov/askasci/wea00/wea00063.htm http://archive.orr.noaa.gov/ [swf]http://www.grow.arizona.edu/flash/water/evaporationpan.swf[/swf] [swf]http://www.grow.arizona.edu/flash/water/evap_swimmingpool.swf[/swf] |
2楼2006-06-05 05:49:40
dengzuyu
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3楼2006-06-05 17:44:06
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