The greater the difference between wet and dry-bulb temperatures, the lower (higher or lower) the relative humidity percentage is (look at the data table for help). This is because the evaporative cooling effect makes the wet bulb’s temperature (warmer or cooler) compared to the dry bulb. Therefore, when the air is (dry or humid), the evaporative cooling effect will be (stronger or weaker).

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.