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Pure iron goes through a polymorphic change from BCC to FCC upon heating at 912°C. (a) Calculate the volume change associated with the change in crystal structure from BCC to FCC if at 912°C the BCC unit cell had a lattice ...Read more
Pure iron goes through a polymorphic change from BCC to FCC upon heating at 912°C.
(a) Calculate the volume change associated with the change in crystal structure from BCC to FCC if at 912°C the BCC unit cell had a lattice constant a = 0.293 nm and the FCC unit cell a lattice constant a’=0.363 nm. Make sure to explain clearly the different steps you have undertaken to come up with the solution.
(b) What consequences this change of volume could have? Give an example where this change of volume is important to consider.
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Assuming that Dulong-Petit law is valid for a monoatomic solid, the ratio of heat Cp/Cv capacities at 500 K is _____. (round off to 3 decimals). Given: molar volume = 7×106 m3 mol-1, isothermal compressibility = 8×1012 Pa1, isobaric expansivity = 6×105K1 ...Read more
Assuming that Dulong-Petit law is valid for a monoatomic solid, the ratio of heat
Cp/Cv capacities at 500 K is _____. (round off to 3 decimals).
Given: molar volume = 7×106 m3 mol-1, isothermal compressibility = 8×1012 Pa1, isobaric expansivity = 6×105K1 andR = 8.314 JK-1mol-1.
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