Question

The structure of the iron changes from bcc (inside-centered cubic) to fcc (cubicface-centered) when heated above 910 ° C. How much will 1 m of wire shrinkiron by changing its structure? Ignore any changes in the radius of the wire andconsider that the radius of the iron atom is 0.1258 nm in the bcc structure and 0.1292nm in the fcc structure, at the transition temperature.Hint: At transition temperature two cells bcc will transform into one cell fcc (explainwhy). 1 nm = 10 -9 m

Answer 1

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