An iron grade has a melting point of 2200°F. Its specific heat = 0.11 Btu/lbm°F, and its heat of fusion = 56.2 Btu/lbm. A 150-lbm block of this cast iron is to be melted. Determine how much heat is required to raise its temperature from 70°F to its melting point and transform it from the solid to liquid phase

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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An iron grade has a melting point of 2200°F. Its specific heat = 0.11 Btu/lbm°F, and its heat of fusion = 56.2 Btu/lbm. A 150-lbm block of this cast iron is to be melted. Determine how much heat is required to raise its temperature from 70°F to its melting point and transform it from the solid to liquid phase. Do not use a comma in your answer.

 

Recall:

 

Required heat H = mC(Tm – Ta) + mHf

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