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How much heat (in kJ) is needed to convert 387 g Fe,03 into pure iron in the presence of excess carbon? kJ When 1.58x107 kJ of heat is added to Fe,0, in the presence of excess carbon, how many kilograms of Fe kg can be produced ?

How much heat (in kJ) is needed to convert 387 g Fe,03 into pure iron in the presence of excess carbon? kJ When 1.58x107 kJ of heat is added to Fe,0, in the presence of excess carbon, how many kilograms of Fe kg can be produced ?

Chemistry: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter4: Energy And Chemical Reactions
Section: Chapter Questions
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How much heat (in kJ) is needed to convert 387 g Fe,03 into pure iron in the presence of excess carbon? kJ When 1.58x107 kJ of heat is added to Fe,0, in the presence of excess carbon, how many kilograms of Fe can be produced ? kg
Transcribed Image Text:How much heat (in kJ) is needed to convert 387 g Fe,03 into pure iron in the presence of excess carbon? kJ When 1.58x107 kJ of heat is added to Fe,0, in the presence of excess carbon, how many kilograms of Fe can be produced ? kg
Iron can be extracted from the iron(III) oxide found in iron ores (such as haematite) via an oxidation-reduction reaction with carbon. The thermochemical equation for this process is: 2 Fe203(s) + 3 C(s) → 4 Fe(1) + 3 CO2(g) AH° = +467.9 kJ
Transcribed Image Text:Iron can be extracted from the iron(III) oxide found in iron ores (such as haematite) via an oxidation-reduction reaction with carbon. The thermochemical equation for this process is: 2 Fe203(s) + 3 C(s) → 4 Fe(1) + 3 CO2(g) AH° = +467.9 kJ
Expert Solution
Step 1

Given:

The weight of Fe2O3 is 387 g.

The given reaction is,

2Fe2O3g+3Cs→4Fel+3CO2g ∆H°=+467.9 kJ

Step 2

The molar mass of Fe2O3 is 159.69 g/mol.

The number of moles is,

Moles=MassMolar mass=387 g159.69 g/mol=2.42 mol

From the given reaction, it is clear that 2 moles of Fe2O3 produce 467.9 kJ heat. Therefore, 2.42 mol of will Fe2O3 produce,

2 mol of Fe2O3=467.9 kJ1 mol of Fe2O3=467.92 kJ2.42 mol of Fe2O3=2.42×467.92 kJ=566.159 kJ

 

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