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Home Q & A Board Science-Related Homework Help Physics
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mikael mikael
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9 years ago

 
A substance has a melting point of 20°C and a heat of fusion of 1.4 × 104 J/kg. The boiling point is 150°C  and the heat of vaporization is 2.8 × 104 J/kg at a pressure of one atmosphere. The specific heats for the solid, liquid, and gaseous phases are 600, 1000, and 400 J/kg · K,  respectively. The quantity of heat surrendered by 0.60 kg of the substance when it is cooled from  240°C to  123°C, at a pressure of one atmosphere, in kJ, is closest to: 
A)
 
55 
B)
 
38 
C)
 
45 
D)
 
87 
E)
 
100 
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padrepadre
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9 years ago
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mikael Author
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9 years ago
Thanks for helping me on my physics homework
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