3 [Page 3) Solid Ar has an foc structure with cubic lattice constant a=5.268, atomic mass mar=6.67-10-26 kg and a Debye
Posted: Mon May 09, 2022 2:39 pm
3 [Page 3) Solid Ar has an foc structure with cubic lattice constant a=5.268, atomic mass mar=6.67-10-26 kg and a Debye temperature Op=92°K. At 10 K. (a) estimate the specific heat capacity Cy. (b) Using the value of Young's modulus, Cu= 1.6-10°N/m², estimate longitudinal velocity of sound v in [100] direction (c) Assuming dimension of crystal to be lmm crystal of Ar and scattering of phonon occurs only from the boundary of the material, estimate the thermal conductivity, K, (in units of Jm-'s 'K?) and (d) describe its low (T<0p) and high temperature (T> 0p) behavior. (8 points)