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Homework Help: Latent heat and binding energy

  1. Feb 21, 2010 #1
    1. The problem statement, all variables and given/known data
    Show that the potential height (energy required to separate 2 nitrogen molecules from each other) for N2 is ~ 0.01eV, given that latent heat of evaporation is 210 Jg^-1 and molecular weight is 28 for N2.


    2. Relevant equations

    I'm thinking that this equation might be of use:

    Latent heat = potential height x 0.5 x N x n

    N = number of atoms in sample
    n = coordination number (number of nearest neighbors surrounding a given atom)


    3. The attempt at a solution

    28 / 6.02 x 10^23 = 4.65 x 10^-23 g per nitrogen atom

    How should I progress from here? Using dimensional analysis, it appears that I might have to multiply (4.65 x 10^-23) by 210 .

    Thanks x
     
  2. jcsd
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