A 4060 Kg Copper Bar Is Put into a Smelter for for Melting

question 63

Multiple Choice

A 406.0 kg copper bar is put into a smelter for melting. The initial temperature of the copper is 300.0 K. How much heat must the smelter produce to completely melt the copper bar? (The specific heat for copper is 386 J/kg•K, the heat of fusion for copper is 205 kJ/kg, and its melting point is 1357 K.)

• A) 2.49 × 10⁵ kJ
• B) 1.66 × 10¹¹ kJ
• C) 1.66 × 10⁸ kJ
• D) 2.96 × 10⁵ kJ

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Definitions:

Budgeting

The method of developing a strategy for managing your finances, detailing your future economic objectives and plans for reaching them.

Revenue Variance

The difference between actual revenue earned and the budgeted or expected revenue.

Budgeting

The process of creating a plan to spend your money, outlining projected income versus expenses over a period.

Revenue Variance

The difference between actual revenue and expected (budgeted) revenue within a specified period.