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The CMC for hexadecyltrimethylammonium bromide (HTAB) in mixtures of water and DMSO have been measured at 25 and 40C. The data is shown below. Determine

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The CMC for hexadecyltrimethylammonium bromide (HTAB) in mixtures of water and DMSO have been measured at 25 and 40C. The data is shown below. Determine the free energy, enthalpy, and entropy of micellization. CMC 103 (mole/L) Mole fraction of DMSO T = 25C T = 40C 0.0 0.92 1.00 0.027 1.48 1.51 0.060 2.24 2.51 0.098 3.60 3.98 0.144 5.62 6.30 0.201 8.91 10.00 0.275 14.00 22.00 0.366 None None

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