1.

If unit area of grain boundary advances a distance 4mm, the number of moles of material that enter in the grain B is 4* (1/ 8(mm3/mol)) and the free energy released is given by_______ (ΔG =10kJ/mol)

A. 5 kJ/mol*mm2
B. 20 kJ/mol*mm2
C. 10 kJ/mol*mm2
D. 40 kJ/mol*mm2
Answer» B. 20 kJ/mol*mm2


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