Thread: Why copper?
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Unread 03-22-2004, 10:56 PM   #12
Cathar
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Join Date: Sep 2002
Location: Melbourne, Australia
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Quote:
Originally Posted by Butcher
Good point, I was quoting per unit mass...
Since Al is more than 3 times less dense than Cu, Al is indeed slightly lower per unit volume.
It's all largely irrelevant, except for how it affects the speed of bulk temperature changes when the heat load changes. When a system is in equilibrium only the thermal conductivity matters.

Thermal Capacity per unit volume:

Water: 4.186 J/K-cm³
Aluminium: 2.430 J/K-cm³
Copper: 3.425 J/K-cm³
Silver: 2.435 J/K-cm³
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