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Suppose you are producing nanoparticles in a vacuum chamber with a pressure of 150 Pa. What is the size of the critical nucleus at 1473 K for (a) copper and (b) gold?
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Step 1
Given:
The vacuum chamber has a pressure of .
The temperature of the nucleus is .
Introduction:
When a liquid solidifies, you need to start somewhere to put the atoms together in crystalline form. There is some energy gain for temperatures below the melting point if atoms are put into the system, and there is some solid - liquid interface with some interface energy.
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