Concept explainers
(a)
The amount of
(a)

Answer to Problem 29PQ
The amount of heat transferred in order for the whole process to take place is
Explanation of Solution
Write the equation for the total heat transferred.
Here,
Write the expression of the heat energy required to raise the temperature to the melting point.
Here,
Write the expression of the heat energy required to raise the temperature to final temperature.
Here,
Rewrite the expression for the total heat transferred from equation (I) by using (II) and (III).
Conclusion:
Substitute
Thus, the amount of heat transferred in order for the whole process to take place is
(b)
The amount of heat transferred to raise copper to its melting point.
(b)

Answer to Problem 29PQ
The amount of heat transferred to raise copper to its melting point is
Explanation of Solution
Write the expression of the heat energy required to raise the temperature to the melting point.
Here,
Conclusion:
Substitute,
Thus, the amount of heat transferred to raise copper to its melting point is
(c)
The amount of heat transferred during phase change.
(c)

Answer to Problem 29PQ
The amount of heat transferred during phase change is
Explanation of Solution
Write the expression of the heat energy required phase change.
Here,
Conclusion:
Substitute
Thus, the amount of heat transferred during phase change is
The approximation is the specific heat of solid copper and the liquid copper is considered as same. The energy is required for copper is about double comparing to the silver.
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