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Homework Help: Statistical Physics - average energy of a system.

  1. Jan 2, 2013 #1
    1. The problem statement, all variables and given/known data

    Imagine a system, in contact with a heat reservoir, with three particles. Each particle may be in a state of energy 0 or ε.

    What's the temperature of the reservoir such that the mean energy of the system, <E>, is 1.2ε?

    2. Relevant equations

    3. The attempt at a solution

    I tried using the formula:

    S = Kb ln(Ω(E))
    dS/dE = Kb / Ω(E) = 1/T

    However I don't think this is the right way to go. Since I only know the average value of the energy I don't think I can find the temperature of the system!

    Any hints would be highly appreciated!

  2. jcsd
  3. Jan 2, 2013 #2
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