Does density vary with form?

Question

I'm doing a lab report, and I need a conclusion. In class we did a lab to find the density of different forms of copper, and to determine if density varies with form.

Answer 1

I believe the asker meant does density vary between forms of the same material (copper, in this case).

The answer is no. As long as you have the same elemental composition, the same atmospheric conditions, and temperature, you have the same density, regardless of shape.

If you found two peices of copper the same temperature had different densities, that would likely be due to impurities or other metals that were mixed into the metal for one reason or another.

Temperature definately effects density, exactly how depends on the material in question. Solids are generally more dense then the same element/molecule in liquid form (though this is not universal, as water is the most dense at 4 deg C, and ice (solid water) is less dense, and hence, floats).

Answer 2

If by 'form' you mean Copper I or Copper II then No, the Density will not be different. (The ' I ' and ' II ' refer to the 2 valences held by Copper as Cu(1+) and Cu(2+)).

If you mean its 'Shape' as in wire, or cubic etc..then, also No. The density of pure Copper is 8.92g/cc (8.92kg/m³)

Answer 3

yes.

The more compact, the more dense.

Liquid water is all jumbled together so it can be really dense in comparison to Solid water, a crystalline structure that has spaces between.

Diamond, although very very strong, has larger spaces between crystalline structures, and therefore is LESS dense than graphite. And unfortunately diamond will spontaneously turn into graphite. Don't worry though. You won't be alive. It'll take millions of years.