chem

posted by .

calculate the surface energy of 100 surface of niobium. The enthalpy of atomization of niobium is 745 kj/mol. express anser inunits of j/cm^2

  • chem -

    2.8*10^-4

  • chem -

    It's wrong btw

  • chem -

    The enthalpy of atomization of nobium is 745 KJ/mole.

    The energy per atom is = 745000/Avogadro Number = 1.2371305e-18 J/atom

    In a BCC structure each atom has 8 neighbors. Then
    The energy per bond is = 1.2371305e-18 / 8 = 1.5464132e-19 J/bond

    Now in a (100) plane the atoms density per unit area is = 4 (1/4) / a * a = 1/a2

    For Nobium a = (2*92.91 / 8.57 * Avogadro number)^(1/3) = 3.30210056e-8 cm

    Then the atoms density is 9.1710574e+14 atoms/cm2

    Finally:The broken bonds are 4 per UC then (half for each surface)
    Surface energy (100) =1/2 * 4 * Atoms density * Bond Energy = 0.00028364488 J/cm2

  • chem -

    so wrong

  • chem -

    try ivos idea

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    Calculate the surface energy of the (100) surface of niobium. The enthalpy of atomization of niobium is 745 kJ/mole. Express your answer in units of J/cm2.
  2. Chemistry

    Calculate the surface energy of the (100) surface of niobium. The enthalpy of atomization of niobium is 745 kJ/mole. Express your answer in units of J/cm2.
  3. science

    Calculate the surface energy of the (100) surface of niobium. The enthalpy of atomization of niobium is 745 kJ/mole. Express your answer in units of J/cm2.
  4. chemistry

    Calculate the surface energy of the (100) plane of niobium. The heat of atomization is 745 kJ/mol. Express your answer in J/cm2.
  5. chemistry

    calculate surface energy of 100 plane of niobium.
  6. chemistry

    Calculate the surface energy of the (100) plane of niobium. The heat of atomization is 745 kJ/mol. Express your answer in J/cm2.
  7. chemistry

    the surface energy of plane of niobium.the heat of atomization is 745 kj/mol
  8. chemistry

    Calculate the surface energy of the (100) plane of niobium. The heat of atomization is 745 kJ/mol. Express your answer in J/cm2.
  9. chemistry

    Calculate the surface energy of the (100) plane of niobium. The heat of atomization is 745 kJ/mol. Express your answer in J/cm2
  10. chemistry

    Calculate the surface energy of the (100) plane of niobium. The heat of atomization is 745 kJ/mol. Express your answer in J/cm2

More Similar Questions