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- The text claims that surface tension varies with temperature, but does not say how. Use the data in Table 22.1 to propose a trend in versus T.Equation 22.6 defines surface tension in terms of Gibbs energy. Borrowing an analogy from chemical potential, we submit that surface tension can also be defined in terms of enthalpy, internal energy, or Helmholtz energy. Write partial derivatives for those definitions.Draw the lattice plane that corresponds to the (111) set of planes
- I need the answer in HandwrittenA quantitative theory of bonding in ionic crystals was developed by Born and Meyer along the following lines: the total force of the system is taken to be: ae² F(r) = N-NA where N is number of positive - negative ion pairs, A and n are constant determined from experiment and at the Madelung constant which depends on the crystal structure of the solid. 1) Derive an expression of the total potential energy and identify the repulsion and the attraction terms. 2) Derive an expression of the equilibrium interatomic distance, re 3) Derive an expression of the bonding energy. 4) if the charge of the ions is double, by what factor both the equilibrium interatomic spacing ro and the bonding energy U(ro) change. Indicate which parameter increase or decrease. Comment on the magnitude of the change of both parameters.Which of the following compounds are consistent with the Huckel rule? I III II IV V VI
- Explain surface characterisation techniquesConsider a bcc crystal. Determine the planar density along the 001 plane.If a Schottky defect concentration of 6.2 x 1010 /cm3 is observed in Al2O3, what is the total vacancy concentration (in 1/cm3) present in this sample of Al2O3? a. 2.3 x 108b. 3.1 x 1010c. 6.2 x 1010d. 1.24 x 1011e. 3.1 x 1011 When compared to that of a covalent material, the short-range atomic structure of amaterial assembled using ionic bonding can be characterized as having a:a) higher coordination numberb) lower atomic packing factorc) higher atomic packing factord) lower coordinationnumbere) a and c only
- 1.List the point coordinates for all atoms that are associated with the FCC unit cell.The lattice energy for potassium iodide, KI, is 627.2kJ/mol. If the ionic separation is 3.533A, what is the repulsive range parameter for KI? You will have to determine which Madelung constant to use.how did you know the molecule has same confiration? is it any way to determine the configuration?
