Chapter 15 : Fuel Cells

Example 15.1 Page No : 321

In [1]:
#Given
del_F = -56.29;#Smath.radians(numpy.arcmath.tan(ard free energy change in Kcal/Kgmole
del_H = -68.317;#Smath.radians(numpy.arcmath.tan(ard heat of reaction in Kcal/kgmole
F = 23.06;#Electro-chemical equivalent in Kcal/volt
J = 2.0;#Valance for H2

#To Calculate the emf of the cell, cell efficiency and heat to be removed to maintain isothermal conditions
#Basis: 1 Kgmole of H2
#From equation 15.4 (page no 355)
E = -del_F/(F*J);
print '1.The emf of the cell is %f volt.'%(E);
n = del_F/del_H*100;
print ' 2.The cell efficiency is %f percent.'%(n);
Q = del_H-del_F;
print ' 3.The heat to be removed is %f Kcal to maintain the temperature at 25 degree celsius.'%(Q);
#end
1.The emf of the cell is 1.220512 volt.
 2.The cell efficiency is 82.395304 percent.
 3.The heat to be removed is -12.027000 Kcal to maintain the temperature at 25 degree celsius.