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// Scilab Code Ex14.5 Dipolar polarization of HCl molecule: Page-470 (2010)
k = 1.38e-023; // Boltzmann constant, J/mol/K
T = 300; // Temperature of the HCl vapour, kelvin
N = 1e+027; // Number of HCL molecuels per unit volume, per metre cube
E = 1e+06; // Electric field strength to which the HCL vapour is subjected, volt/m
p = 3.46e-030; // The dipole moment of HCl molecule,C-m
alpha_d = p^2/(3*k*T); // Dipolar polarizability of HCl molecule, farad-metre square
// As P = N*p = N*alpha_d*E
P = N*alpha_d*E; // Orientational or Dipolar polarization of HCl molecule, coulomb per metre square
E_M = p*E; // Magnetic energy stored in the dipole-field system, joule
E_Th = k*T; // Thermal energy of the HCl molecule, joule
a = E_M/E_Th; // Ratio of magnetic energy to the thermal energy
printf("\nThe orientational polarization of molecules in HCl vapour = %4.2e coulomb per metre square", P);
printf("\nThe ratio of magnetic energy to the thermal energy = %f << 1", a);
// Result
// The orientational polarization of molecules in HCl vapour = 9.64e-007 coulomb per metre square
// The ratio of magnetic energy to the thermal energy = 0.000836 << 1
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