[例2某气相反应在400K时的k,=103kPas, 则同温下k=? 解：反应为几级？p=nRTp=(W/MRT=cRT = 1 dce=k.co dt 1 dt RT.den=kpi=k,(RT)c VB dt rp =RTrek(RT)'ci =(RT)k.ci k=k RT=3.3256(mol dm )s [例2] 某气相反应在400K时的kp= 10-3 (kPa)-1·s -1 ， 则同温下kc= ？ 解：反应为几级？ pV=nRT pV=(n/V)RT=cRT 2 B 2 2 B B B B B ( ) d d d 1 d k p k R T c t R T c t p r p = p = p =  =    2 B B B d 1 d k c t c r c = = c  p RTr c r = 2 B 2 B 2 k (RT ) c (RT )k c p = c 3 1 1 3.3256(mol dm ) s − − − k = k RT =   c p