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Posted by on Wednesday, August 15, 2012 at 9:50pm.

38.0kg mass of copper is melted to be cast into a graphite mold at a copper pipe foundtry. If the solid copper starts off at the normal melting temperature of copper and the liquid copper is put into the mold at the crystallization point of copper, how much heat is added to melt the copper? kJ

Melting point 1084.62 °C (from Wiki)
Heat fusion 13.26 kJ·mol^−1 (from wiki)
crystallization point of copper - ? not listed
38kg x 1kmol/63.55kg = 0.598kmol (if I did this right)

  • Chemistry - , Wednesday, August 15, 2012 at 11:30pm

    I would think that melting point and crystallization point would be the same.
    q = heat needed = mass Cu x heat fusion

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