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Equilibrium concentration of point defects in solids is defined as $\chi=\exp(\frac{\Delta s}{k_B})\exp(\frac{-\Delta h}{k_BT})$. At high temperatures, may be even higher than melting temperature of the solid, does the entropy become undefined meaning there will be no equilibrium concentration for point defects?

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  • $\begingroup$ Why would the entropy become undefined? $\endgroup$ – Buck Thorn Apr 20 at 9:05
  • $\begingroup$ Could you elaborate as to why you think entropy will become undefined. $\endgroup$ – A.K. Apr 20 at 15:21
  • $\begingroup$ I was thinking may be at a high enough temperature, the number of microstates becomes infinite hence the $S=k_B \ln W$ becomes infinite/undefined? $\endgroup$ – ahmf Apr 20 at 17:11

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