Relative-rate kinetic experiments were carried-out at T = 310 +/- 3 K to determine rate constant ratios for the reactions of Br atoms with C2H6(1), CH2ClBr(2) and neo-C5H12(3). Br atoms were produced by stationary photolysis of Br-2 and the consumption of the reactants was determined by gas-chromatography. k (2)/k (1) = 1.174 +/- 0.053 and k (3)/k (1) = 0.458 +/- 0.027 were determined (with 1 sigma precision given). The rate constant ratios were resolved to absolute k (1) values, and k (1)(310 K) = (2.27 +/- 0.30) x 10(5) cm(3) mol(-1) s(-1) was recommended. The recommended k (1) was applied in a third law analysis providing Delta(f) H (o) (298)(C2H5) = (122.0 +/- 1.9) kJ mol(-1).