Chapter24 Nuclear Chemistry

Example 24.1,Page no.85

In [21]:
import math
#intialisation of varaibles
E=931 #Mev/amu
nc=6
m=1.00814 #amu
m1=1.00898
mc=12.0038
#CALCULAIONS
md=nc*m+nc*m1-mc 
BE=E*md 
#RESULTS 
BE=round(BE,2)
print 'Binding Energy =',BE,'Mev'

Binding Energy = 92.09 Mev

Example 24.2,Page no.85

In [5]:
import math
#intialisation of varaibles
r=1.07*10** -4 #ml gˆ−1 dayˆ−1
N1=3.4*10**10 # alpha particles gˆ−1 secˆ−1 
#CALCULATIONS 
N=22400*N1*24*60*60/r 
#RESULTS 
N=N*10**-23
N=round(N,3)
print 'avagadro number =',N,'* 10**23'

avagadro number = 6.15 * 10**23

Example 24.3,Page no.86

In [23]:
import math
#intialisation of varaibles
R=0.08205 # l−atm moleˆ−1 Kˆ−1
T=25 #C
p=1 #atm
Mr=226 #gms
th=3.82 # days
t=1620 # years
#CALCULATIONS 
NRn=th/(Mr*t*365.26) 
V=NRn*R*(273+T)*1000/p 
#RESULTS
V=round(V,4)
print 'millilitres of radon =',V,'ml'

millilitres of radon = 0.0007 ml

Example 24.4,Page no.86

In [35]:
import math
#intialisation of varaibles
mli=7.01822 #amu
mH=1.00814 #amu
mHe=4.00387 #amu
n=2
E=931 #Mev/amu
#CALCULATIONS
dE=(-n*mHe+mH+mli)
#RESULTS 
dE=round(dE,3)
print 'total energy of this reaction =',dE,'Mev'

total energy of this reaction = 0.019 Mev

Example 24.5,Page no.87

In [33]:
import math
#intialisation of varaibles
mr=2.01474 #amu 
mH=0.00237 #amu 
mD=1.00814 #amu 
#CALCULATIONS 
mn=mr+mH-mD 
#RESULTS
mn=round(mn,3)
print 'mass of neutron =',mn,'amu'

mass of neutron = 1.009 amu

Example 24.6,Page no.87

In [3]:
import math
#intialisation of varaibles
t=1600 # years 
M=226.0 #gms 
k=3.7*10**10 # disintegrations per second 
#CALCULATIONS 
wl=0.693/(t*365*24*60*60) 
r=wl*6.02*10.0**23.0/M 
#RESULTS
r=r/10**6
r=round(r,1)
print 'wavelength = ',r,'M disintegrations per second'

wavelength =  36584.3 M disintegrations per second

Example 24.8,Page no.88

In [27]:
import math
#intialisation of varaibles
ku=1.52*10** -10 # yearˆ−1
ru=0.0453
ru1=1.0523
Mu=238 #gms
mu=206 #gms
#CALCULATIONS
dt=ru*Mu/(ku*ru1*mu) 
t=2.303*math.log10(ru1/(ru1 -(ru*Mu/mu)))/(ku*10**6) 
#RESULTS
t=round(t,3)
print 'age of pitchblende =',t,'million years'

age of pitchblende = 335.686 million years