A study of the Br+IO->I+BrO and the reverse reaction

被引:25
作者
Gilles, MK
Turnipseed, AA
Burkholder, JB
Ravishankara, AR
机构
[1] NOAA,AERON LAB,BOULDER,CO 80303
[2] UNIV COLORADO,COOPERAT INST RES ENVIRONM SCI,BOULDER,CO 80309
[3] UNIV COLORADO,DEPT CHEM & BIOCHEM,BOULDER,CO 80309
关键词
D O I
10.1016/S0009-2614(97)00485-5
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The rate coefficient, k(1) (298 K)=(5.0+/-1.1)x10(-11) cm(3) molecule(-1) s(-1), for the reaction, Br+10-->I+BrO (1) was determined by monitoring the temporal profiles of IO in an excess of Br. The rate coefficient for the reverse reaction, I+BrO-->IO+Br(-1), k(-1) (298 K)=(1.9+/-1.1)x10(-11) cm(3) molecule(-1) s(-1), was determined by modeling IO temporal profiles, measured in the presence of BrO and O-3, in which the regeneration of IO was observed. From these rate coefficients, the difference in the heats of formations of IO and BrO, Delta(f)H(0) (298 K) (BrO)-Delta(f)H(0) (298 K) (IO), was calculated to be 0.5+/-0.6 kcal mol(-1). (C) 1997 Elsevier Science B.V.
引用
收藏
页码:75 / 82
页数:8
相关论文
共 26 条
[11]  
GURICH LV, 1989, THERMODYNAMIC PROPER, V1
[12]   Absorption cross sections and self-reaction kinetics of the IO radical [J].
Harwood, MH ;
Burkholder, JB ;
Hunter, M ;
Fox, RW ;
Ravishankara, AR .
JOURNAL OF PHYSICAL CHEMISTRY A, 1997, 101 (05) :853-863
[13]   KINETIC-STUDY OF THE REACTION OF CHLORINE ATOMS WITH CF3I AND THE REACTIONS OF CF3 RADICALS WITH O2, CL2 AND NO AT 296-K [J].
KAISER, EW ;
WALLINGTON, TJ ;
HURLEY, MD .
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS, 1995, 27 (03) :205-218
[14]   Kinetic studies of the reactions of BrO and IO radicals [J].
Laszlo, B ;
Huie, RE ;
Kurylo, MJ ;
Miziolek, AW .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1997, 102 (D1) :1523-1532
[15]   EXTINCTION COEFFICIENTS OF CHLORINE MONOXIDE AND CHLORINE HEPTOXIDE [J].
LIN, CL .
JOURNAL OF CHEMICAL AND ENGINEERING DATA, 1976, 21 (04) :411-413
[16]  
MALLESON AM, 1990, FACSIMILE
[17]   A comparative study of the diatomic halogen oxides in their ground electronic states [J].
McGrath, MP ;
Rowland, FS .
JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (12) :4815-4822
[18]   Rate coefficients for the thermal decomposition of BrONO2 and the heat of formation of BrONO2 [J].
Orlando, JJ ;
Tyndall, GS .
JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (50) :19398-19405
[19]   BOND-ENERGY OF IO RADICAL FROM MOLECULAR-BEAM REACTIVE SCATTERING MEASUREMENTS [J].
RADLEIN, DSA ;
WHITEHEAD, JC ;
GRICE, R .
NATURE, 1975, 253 (5486) :37-37
[20]  
REDDY RR, 1989, INDIAN J PURE AP PHY, V27, P243