1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted