The very‐low‐pressure study of the kinetics and equilibrium: Cl + CH₄ ⇄ CH₃ + HCl at 298 K. The heat of formation of the CH₃ radical

Abstract

The bimolecular rate constant for the direct reaction of chlorine atoms with methane was measured a t 25°C by using the very-low-pressure-pyrolysis technique. The rate constant was found to beIn addition, the ratio k&-l was observed with about 25% accuracy:

The determination of the arrhenius parameters for the reaction Cl + C2F5I → ICl + C2F5 using a competitive method

“…This equation is compatible with k2 = 6.0 X 1O'O cm3/mol sec at 25"C, which seems well established [2].…”

“…(1) ( 2 ) have been studied competitively over the range of 2%182'C by photolysis of mixtures of C12…”

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AbstractThe reactions(1) ( 2 ) have been studied competitively over the range of 2%182'C by photolysis of mixtures of C12 + C2F5I + CH4. We obtain log k l / k 2 = (0.96 f 0.06) + (1210 f 440)/0 where 0 = 2.303RT J/mol.

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The reactions(1) ( 2 ) have been studied competitively over the range of 2%182'C by photolysis of mixtures of C12We obtain log k l / k 2 = (0.96 f 0.06) + (1210 f 440)/0 where 0 = 2.303RT J/mol. The use of published data on reaction (2) leads to log (kl(cms/mol sec) = (13.96 f 0.2) -(11,500 f 2000)/0 * Present address:

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Consistency of theory and experiment in the ethane–methyl radical system

“…= 35.1 f 0.15 kcal at 298 K [21], the currently available data being summarized in Table I, while the ideal gas thermodynamic properties of ethane have been critically evaluated and tabulated from 0 to 1500 K [22].…”