AOS145_HW02_W17 (1) - AOS 145 Homework#2 Winter 2017 – Li...

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Unformatted text preview: AOS 145 Homework #2 Winter 2017 – Li Due 2/1/2017 Name: ________________________________ ID: ___________________________________ 3 QUESTIONS (10 points total) 1. a) [1 point] Use the Clausius­Clapeyron equation and the water vapor pressure at 0°C of 6.1129 mbar (1 mbar = 1 hPa = 100 Pa) to calculate the saturation vapor pressure of water at 5, 10, 15, 25, and 30°C. b) [1 point] How well do the calculated values compare to the attached list of measured values from t he Handbook of Chemistry and Physics attached below? (SVP short for saturation vapor pressure). c) [1 point] Make a plot of the water saturation vapor pressure against temperature from 0 to 30°C based on your calculation. 2. [4 points] You dissolve 10 g of NaCl in a glass containing 1000 cm 3 of water. The glass is in a room with temperature of T = 20°C and a constant relative humidity of RH = 97%. Calculate the volume of the solution that will be left in the glass after several days. 3. [3 points] For a drop of pure water to be formed from water vapor (without the help of a condensation nuclei or other particles) it has to accumulate water molecules starting at clusters that contain less than 10 water molecules. The saturation ratio in the atmosphere rarely exceeds 1.01. How likely do you think it is to find a droplet of pure water large enough to exceed the critical radius at this saturation? Support your conclusions with an estimate using the Kelvin equation. ...
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