Solved: Fluorocarbons (compounds that contain both carbon

Chapter 8, Problem 106IE

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Problem 106IE

Fluorocarbons (compounds that contain both carbon and fluorine) were, until recently, used as refrigerants. The compounds listed in the following table are all gases at 25 °C, and their solubilities in water at 25 °C and 1 atm fluorocarbon pressure are given as mass percentages. (a) For each fluorocarbon, calculate the molality of a saturated solution. (b) Explain why the molarity of each of the solutions should be very close numerically to the molality. (c) Based on their molecular structures, account for the differences in solubility of the four fluorocarbons. (d) Calculate the Henry’s law constant at 25 °C for CHClF2, and compare its magnitude to that for N2 (6.8 × 10-4 mol/L-atm). Suggest a reason for the difference in magnitude.