H_2+Br_2光化反应的温度系数

The Temperature Coefficient of the Photochemical Reaction H_2+ Br_2

推导了H_2+Br_2+hv→2HBr反应中次级反应活化能(E_(sec))与各基元反应的活化能的关系E_(sec)=E_2-E_4+E_3,推导了速率常数与温度、次级反应的活化能之间的关系1nk(T_2)/k(T_1)=E_(sec)/R(1/T_1-1/T_2).计算了次级反应的活化能及温度系数,计算值为E_(sec)=102.15kJ·mol^(-1),k(483K)/k(473K)=1.71.

For the photochemical reaction H2＋ Br2＋ hv→2 HBr,the relation between the activation energy（ E（sec）） of secondary reaction and the activation energy of each elementary reaction is deduced as the formula E（sec）= E2-E4＋ E3,and the relation among rate constant,temperature and activation energy of secondary reaction is deduced as the formula 1 nk（ T2）/k（ T1）=E（sec）/R（1/T1-1/T2）. The activation energy of secondary reaction（ E（sec）） and the temperature coefficient of the photochemical reaction are calculated,the values are E（sec）= 102.15 kJ·mol^-1,k（ 483 K）/k（ 473 K）= 1. 71.