Using the graph below, calculate the relative humidity of an air mass at 20°C and a vapor pressure of 1.25 kPa ? SHOW YOUR WORK ! Also, if the air mass at 20°C and vapor pressure of 1.25 kPa begins to cool, dropping in temperature. At what approximate temperature will cloud (rain) or dew formation occur? 8 7 6 Saturation vapor pressure 5 4 3 2 Vapor pressure (kPa) 1 0 -30 -20 -10 0 10 20 30 40 Temperature (°C)
Added by Michael B.
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Looking at the graph, we can see that the saturation vapor pressure at 20°C is approximately 2.3 kPa. Show more…
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