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andrezito [222]
3 years ago
12

Metals are extracted from their ores.

Chemistry
1 answer:
zvonat [6]3 years ago
7 0
1.  Copper is very useful, so people want as much as possible.
2.  We are running out, so we are extracting all the copper that we can to keep up with our needs.
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Explanation:

It is known that heat (Q) required to change the phase of a given sample of mass m will be as follows.

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where,    L_{f} = latent heat of fusion

Similarly,   Q_{v} = mL_{v}[/tex]  ....... (2)

where,     L_{v} = latent heat of vaporization

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