Please solve 1 and 2 in one hour please
Transcribed Image Text: For the types of systems that we will examine in thermodynamics, there are large numbers of
particles in the system (~Avogadro's number of particles) each with very large numbers of
possible states (1020 possible values). We can look at the list of possible arrangements on your
whiteboard as a plot of a number of possible microstates (horizontal) versus the macrostates
(vertical). As the number of equally probable values grows for each of many particles, the peak
that you see in the possibilities on your whiteboard gets larger and larger, and at the same time
it gets narrower and narrower. For the very large numbers in real thermodynamic systems, the
peak that represents the value of a measurement is narrower than any normal experimental
error can detect. In addition, the size of the peak approaches a probability of 100%. Now that
we see the role of many different microstates of a system resulting in the same value for a
macrostate measurement, we will look at how this might cause a particular outcome for a real
problem. We will now look at an example from D. Schroeder's book, Thermal Physics. Imagine
a system that has three atomic-size harmonic oscillators. In PHYS121, we learned that these
oscillators have energies of
AE = hf = hw/2TT = ħw where ħ = 1.05 x 10-34 J.s
You can draw the energy as a ladder with equally spaced rungs the lowest being at E = 0,
the next at E = ħw, the next at E = 2hw, and so on.
1) On a scratchpad draw three ladders (side-by-side) with E0 = 0, E1 = ħw, E2 = 2ħw, E3 =
3ħw as the steps for each ladder.
If we had the box of oscillators with zero total energy, there is only one way for this to
occur. We can use a set of ordered triplets (osc1, osc2, osc3) to list the various ways
that the energy one add up to zero in these oscillators. The total energy of this system
would be (0, 0, 0). See how that works with your scratchpad ladders.
2) Now, if the box had a total energy of one unit, how many different ways could this occur
in the set of three oscillators in our box? Use the ordered triplets and list below the
various ways that this could occur. Notice how that might look with your scratchpad
ladders.
3) Now, if the box had a total energy of two units, how many different ways could this occur
in the set of three oscillators in our box? Use the ordered triplets and list below the
various ways that this could occur. Notice how that might look with your scratchpad
ladders.
4) Finally, if the box had a total energy of three units, how many different ways could this
occur in the set of three oscillators in our box? Use the ordered triplets to list the various
ways that this could occur.
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