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# Thermal Physics question (got the answer, just confused) watch

1. Lead of mass 0.75kg is heated from 21 degrees to its melting point and continues to be heated until it has all melted. Calculate how much energy is supplied to the lead.
Melting point = 327.5
specific latent heat of fusion of lead = 23000Jkg^-1

So I got the correct answer for this question but I'm a bit confused why they give you the specific latent heat of fusion when they say the lead is melting? Is the value the same for fusion and melting?
2. Yes. Going from liquid to solid releases as much energy as the energy needed to go from a solid to a liquid.
3. (Original post by haarithiop)
Yes. Going from liquid to solid releases as much energy as the energy needed to go from a solid to a liquid.
Ah ok thank you!

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Updated: October 17, 2017
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