4 (a) For the solidification of nickel, calculate the
Chapter 10, Problem 10.4(choose chapter or problem)
4 (a) For the solidification of nickel, calculate the critical radius r* and the activation free energy G* if nucleation is homogeneous. Values for the latent heat of fusion and surface free energy are 2.53 109 J/m3 and 0.255 J/m2 , respectively. Use the supercooling value found in Table 10.1. (b) Now, calculate the number of atoms found in a nucleus of critical size. Assume a lattice parameter of 0.360 nm for solid nickel at its melting temperature.
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