Chapter12 Chemical Kinetics

Example 12.1, Page no.48

In [3]:
import math
#initialisation of variables
Vs=23.95 #ml 
Ve=34.75 #ml 
#CALCULATIONS 
fr=(Ve-Vs)/Ve 
#RESULTS 
fr=round(fr,3)
print 'fraction of nitrogen pentoxide remain unreacted after 1 hour=',fr

fraction of nitrogen pentoxide remain unreacted after 1 hour= 0.311

Example 12.2, Page no.48

In [4]:
import math
#initialisation of variables
Ps=200.0 #mm 
Pe=390.0 #mm 
Pt=300.0 #mm 
t=500.0    #sec
Pe1=400.0 #mm 
#CALCULATIONS 
r= (Pe1-Pt)/(Pe1 -Ps)
#RESULTS
print 'fraction remained undecomposed',r

fraction remained undecomposed 0.5

Example 12.3, Page no.49

In [5]:
import math
#initialisation of variables
V=1200.0 #ml
V1=100.0 #ml
t=300.0 # sec
#CALCULATIONS
r=V/t
t1=V1/r
#RESULTS 
print 'time of residence of gas=',t1,'sec'

time of residence of gas= 25.0 sec

Example 12.4, Page no.49

In [6]:
import math
#initialisation of variables
y=0.550
x=2400.0
d=0.00494
#CALCULATIONS
s=y/x
k=s*2.303/d
#RESULTS 
k=round(k,3)
print 'k=',k,'lit molˆ−1 secˆ−1'

k= 0.107 lit molˆ−1 secˆ−1

Example 12.7, Page no.50

In [7]:
import math
from math import sqrt,pi
#initialisation of variables
T=393.7 #C 
k=2.6*10** -4 # l i t molˆ−1 secˆ−1 
R=1.987 # cal moleˆ−1 Kˆ−1 
E=45.6 # kcal moleˆ−1 
wl=3.5 #A 
N=6*10**23 # molecules 
R1=8.31*10 # ergs moleˆ−1 Kˆ−1 
M=127.9 #g moleˆ−1 
#CALCULATIONS 
k=2*10**2*N*sqrt(pi*R1*(273.1+T)/M)*(wl*10**-8)**2*math.exp(-E*10**3/(R*(273.1+T)))
#RESULTS
k=round(k,4)
print 'second order rate for this constant=',k,'lit molˆ−1 secˆ−1'

second order rate for this constant= 0.0061 lit molˆ−1 secˆ−1