CH3Br, 151109

Agust, www,....Nov09/PPT-151109ak.ppt

Quantity Value Units Method Reference Comment

ΔfH°gas -34.3 ± 0.8 kJ/mol Eqk Ferguson, Okafo, et al., 1973

ΔfH°gas -38. ± 1.3 kJ/mol Chyd Adams, Carson, et al., 1966

ΔfH°gas -37.5 ± 1.5 kJ/mol Chyd Fowell, Lacher, et al., 1965

CH3Br(g) Quantity Value Units Method Reference Comment

ΔfH°gas -36.29 ± 0.16 kJ/mol Review Cox, Wagman, et al., 1984 CODATA Review value

ΔfH°gas -36.44 kJ/mol Review Chase, 1998 Data last reviewed in September, 1965

CH3Br(g):

HBr(g):

Quantity Value Units Method Reference Comment

ΔfH°gas 716.68 ± 0.45 kJ/mol Review Cox, Wagman, et al., 1984 CODATA Review value

ΔfH°gas 716.67 kJ/mol Review Chase, 1998 Data last reviewed in March, 1983

H2(g)

CH3Br(g) -> H2(g) + C(g) + HBr(g)H = -36.29 + 0 + 716.68 + 34.3 = 714.69 kJ mol-1 = 714.69 x 83.59346 = 59743.4 cm-1

E = H –RTng = 714.69 – 8.3144*1e-3*298*2 = 709.71kJ mol-1709.73* 83.59346 =59329 cm-1

-to be compared with the value of 58840 from AB (041109)