C6H5N2Cl -----------------------------> C6H5Cl + N2
0.088Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
0Â Â Â Â Â Â Â Â Â Â Â Â
0
0.088
-x                                             Â
x            Â
x
for first order
t = 10 h = 10 x 60 x 60 = 36000 sec
k = 1/t ln (Po /Pt)
4.3 x 10^-5 = 1/ 36000 ln (0.088 / Pt)
Pt = 0.0187
after 10 hours its partial pressure = 0.0187
atm
half life = 0.693 / k
           Â
= 0.693 / 4.3 x 10^-5
          Â
= 16116 sec
