an environmental engineer was assigned to monitor the concentration of organic compound A in a lake that had been polluted by a chemical plant. After a field trip sampling the polluted water, she measured the mole faction of this compound, x = 106. While at that concentration the organic

compound was not considered as a major concern for the aquatic system, noticed that the chemical had strong pulmonary toxicity and a fairly high vapor pressure at room temperature, Psat = 0.5 atm. She predicted the concentration of this organic compound in the air atmosphere based on its activity coefficient in water at infinite dilution, g=10. She reported the results to her supervisor who was very much impressed. A A) Why is the activity coefficient so large? Why does the organic compound show up in the air at such a low concentration B) What is the mole fraction of the toxic compound in the air right above the lake

assigned to monitor the concentration of organironmental engineer : polluted by a chemical plant. After a field thand compound A in a lake that heen the mole faction of this compound, xA=105. Whe polluted water, she measured compound was not considered as a major comat concentration the organic noticed that the chemical had strong pulmonary toxicty aquatic system, at room temperature, PAsat=0.5atm. She predicd toxicity and a fairly high vapor pressure compound in the air atmosphere based on its activily coeficist in water at ingic dilution, gA=103. She reported the results to her impressed. A) Why is the activity coefficient so large? Why does the organic compound show up in the air at such a low concentration B) What is the mole fraction of the toxic compound in the air right above the lake