Amount of energy needed to melt a solid

[SelenaT]

Homework Statement

A jeweler heats 25g of pure gold until molten. If the initial temperature of the gold is 22 degrees celsius, calculate the amount of energy required for the process.

Homework Equations

c = 129
Lf= 64 500
Lv = 1578000
Tmelt = 1064

The Attempt at a Solution

Q = mct
= 0.25kg(129)(1064-22)
= 33605J

 

[Chestermiller]

You need to add the latent heat of fusion. The problem statement indicates that the gold in the final state is molten.

Chet

 

[SteamKing]

And please get in the habit of indicating units for the quantities used in your calculations. It is very confusing otherwise.