The dimerization of ClO in the Antarctic winter stratosphere is believed to play an
Chapter 7, Problem 7.34(choose chapter or problem)
The dimerization of ClO in the Antarctic winter stratosphere is believed to play an important part in that regions severe seasonal depletion of ozone. The following equilibrium constants are based on measurements by R.A. Cox and C.A. Hayman (Nature 332, 796 (1988)) on the reaction 2ClO (g) (ClO)2 (g). T/K 233 248 258 268 273 280 K 4.13 108 5.00 107 1.45 107 5.37 106 3.20 106 9.62 105 T/K 288 295 303 K 4.28 105 1.67 105 7.02 104 (a) Derive the values of rH7 and rS7 for this reaction. (b) Compute the standard enthalpy of formation and the standard molar entropy of (ClO)2 given fH7(ClO) = +101.8 kJ mol1 and S7m (ClO) = 226.6 J K1 mol1 (CRC Handbook 2004).
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