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Metallurgical Engineering · Q48

Physical Metallurgy

Engineering and GATE · Metallurgical Engineering · question 48

Q48

The critical nucleus size (in mm) when copper melt is under-cooled by 100K is Given data: Melting point: 1356 K Density: 8900 kg.m-3 Solid-liquid interfacial energy: 0.5 Jm-2 Latent heat of freezing: 13000 J. mol-1 Molar volume: 7 × 10-6 m3 mol-1

A.
0.36
Answer
B.
1.55
C.
3.65
D.
7.30

Answer: Option A

Solution

Answer: Option A
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