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Unformatted text preview: the expression where n 1,2 is the positive or negative integer charge of the ion, e.g. for Na + interacting with Cl, n 1 =+1 and n 2 =1. To do these calculations you need the free space permittivity constant and the unit charge . a) Using your values for and e, calculate . Solution: b) Calculate the Coulombic interaction V(r) between two Ca 2+ ions separated by r=2x109 m. Solution: c) Calculate the interaction per mole of Ca 2+ pairs Solution: 3) Using the Table of bond enthalpies provided, calculate the reaction enthalpy for: Note : O 2 is O=O and CO 2 is O=C=O. Bond CH CO O=O OH C=O Enthalpy (kJmol1 ) 413 358 495 467 799 Solution: Calculate total enthalpy of bonds broken: Now calculate the enthalpy of bonds formed: Final calculation:...
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 Fall '12
 Chiu
 Atom, Mole, Electric charge, Molecule, Discussion Section Problems, Lennard Jones equation

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