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You Have a Summer Job in a Lead Foundry

Question 115

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You have a summer job in a lead foundry. Your task is to identify how energy efficiency can be improved. You therefore need to know the minimum amount of energy it takes to raise 1 pound of lead (454 g) from room temperature (25 You have a summer job in a lead foundry. Your task is to identify how energy efficiency can be improved. You therefore need to know the minimum amount of energy it takes to raise 1 pound of lead (454 g) from room temperature (25 <font face= symbol ></font>) to its melting point (327 <font face= symbol ></font>) and then melt it. The specific heat capacity of lead is 0.159 J/(g <font face= symbol ></font> <font face= symbol ></font>) , the enthalpy of fusion is 24.7 J/g, and the molar mass is 207 g/mol. A) 3.39 MJ B) 21.9 kJ C) 21.0 kJ D) 33.0 kJ E) 11.0 kJ ) to its melting point (327 You have a summer job in a lead foundry. Your task is to identify how energy efficiency can be improved. You therefore need to know the minimum amount of energy it takes to raise 1 pound of lead (454 g) from room temperature (25 <font face= symbol ></font>) to its melting point (327 <font face= symbol ></font>) and then melt it. The specific heat capacity of lead is 0.159 J/(g <font face= symbol ></font> <font face= symbol ></font>) , the enthalpy of fusion is 24.7 J/g, and the molar mass is 207 g/mol. A) 3.39 MJ B) 21.9 kJ C) 21.0 kJ D) 33.0 kJ E) 11.0 kJ ) and then melt it. The specific heat capacity of lead is 0.159 J/(g You have a summer job in a lead foundry. Your task is to identify how energy efficiency can be improved. You therefore need to know the minimum amount of energy it takes to raise 1 pound of lead (454 g) from room temperature (25 <font face= symbol ></font>) to its melting point (327 <font face= symbol ></font>) and then melt it. The specific heat capacity of lead is 0.159 J/(g <font face= symbol ></font> <font face= symbol ></font>) , the enthalpy of fusion is 24.7 J/g, and the molar mass is 207 g/mol. A) 3.39 MJ B) 21.9 kJ C) 21.0 kJ D) 33.0 kJ E) 11.0 kJ ) , the enthalpy of fusion is 24.7 J/g, and the molar mass is 207 g/mol.


A) 3.39 MJ
B) 21.9 kJ
C) 21.0 kJ
D) 33.0 kJ
E) 11.0 kJ

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