Question

can someone solve this

6. For a given material, Do = 1.6 x 10 m2 s1,O- 181 kJmol and R = 8.314 JKmol 950°C? 1222 (a) 2.97 x 10-12 mol/m2 (b) 8.6 x 10' m2.s" What is the diffusion coefficient at D--Du exe 11006) (.6E-4)e D (c) 8.6 x 103 mol/m2 (d) 2.97 x 1012 m2.s (e) 1.78 x 10-14 m2.s 16163.03) PC Dr (e-1)e

Answer 1

la D =_lado - Qd R IT D = 1.6x 10-4 m² s 1 R = 8.314 J K - mal' Qd = 181kImel-1 T = 950°C = (273+950k = 1 223k ln D = ln (1.68 10-4) - 181810²J/mol 8.314 Jkt mal 1 | 1223k /

I l = -8.74 -17.8 - e -26.54 - 2.97 10-12 m² st Ans (d)