Thursday, 6 December 2018

thermodynamics - What are the six degrees of freedom of the atoms in a solid?


A monoatomic ideal gas has heat capacity $C_v=1.5$ which comes from the three translational degrees of freedom. For solids at high temperature, $C_v=3$, implying six degrees of freedom.


What are those six degrees of freedom? I do not know much about how solids work, but I suppose translation and rotation do not contribute. What then? Vibration?




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