## Phase change

1. The problem statement, all variables and given/known data
Ok this one is easy I just want to make sure:
A metal of mass $$M$$ is in a smelter at temperature $$T_{o}$$.
How much heat does it take to melt the metal. Given: heat capacity, melting point $$T_{m}$$

2. Relevant equations
$$Q=Mc\Delta T$$

3. The attempt at a solution
So it would be simply
$$Q=Mc(T_{m}-T_{o})$$
Right?

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 Blog Entries: 1 Recognitions: Gold Member Science Advisor Staff Emeritus That's just the energy required to heat the metal up to the melting point, what about the actual phase change (i.e. latent heat)?
 so $$\frac{Q}{M}=L$$ Q being the previous answer from $$Q=Mc\Delta T$$

## Phase change

it should be $$Q=Mc\Delta T + ML$$ if you melt solid to liquid

$$Q=Mc\Delta T$$ (unchange state)
$$Q=ML$$ (change state)

 Quote by Weave so $$\frac{Q}{M}=L$$ Q being the previous answer from $$Q=Mc\Delta T$$
So I am incorrect?

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Staff Emeritus
 Quote by Weave so $$\frac{Q}{M}=L$$ Q being the previous answer from $$Q=Mc\Delta T$$
Q isn't necessarily that from the previous answer.

 so..what I am I looking for?

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