The effect of symmetry on the rotational partition function for H 2 was evaluated by recognizing that
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The effect of symmetry on the rotational partition function for H2 was evaluated by recognizing that each hydrogen is a spin 1/2 particle and is, therefore, a fermion. However, this development is not limited to fermions, but is also applicable to bosons. Consider CO2, in which rotation by 180° results in the interchange of two spin 0 particles.
a. Because the overall wave function describing the interchange of two bosons must be symmetric with respect to exchange, to what J levels is the summation limited to in evaluating qR for CO2?
b. The rotational constant for CO2 is 0.390 cm–1. Calculate qR at 298 K. Do you have to evaluate qR by summation of the allowed rotational energy levels? Why or why not?
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a To ensure that the wave function remains symmetric with ...View the full answer
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