repair crews to weld rails together. -) Ⓡ 2Fe(s) + Al2O3(s) DH rxn= -850 kJ -n, in grams, is formed when 725 kJ of heat is released? - in decimal notation rounded to three significant figures.
repair crews to weld rails together. -) Ⓡ 2Fe(s) + Al2O3(s) DH rxn= -850 kJ -n, in grams, is formed when 725 kJ of heat is released? - in decimal notation rounded to three significant figures.
General Chemistry - Standalone book (MindTap Course List)
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
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Chapter6: Thermochemisty
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![**The highly exothermic thermite reaction, in which aluminum reduces iron (III) oxide to elemental iron, has been used by railroad repair crews to weld rails together.**
\[2\text{Al}(s) + \text{Fe}_2\text{O}_3(s) \rightarrow 2\text{Fe}(s) + \text{Al}_2\text{O}_3(s)\]
\[ \Delta H_{rxn} = -850 \text{kJ} \]
**What mass of iron, in grams, is formed when 725 kJ of heat is released?**
Express your answer in decimal notation rounded to three significant figures.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9413ee1b-018f-4e4f-9457-fb88f0adac84%2F4e829ed2-db98-4b46-8d37-9f98bbe22953%2Ftew3sem_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**The highly exothermic thermite reaction, in which aluminum reduces iron (III) oxide to elemental iron, has been used by railroad repair crews to weld rails together.**
\[2\text{Al}(s) + \text{Fe}_2\text{O}_3(s) \rightarrow 2\text{Fe}(s) + \text{Al}_2\text{O}_3(s)\]
\[ \Delta H_{rxn} = -850 \text{kJ} \]
**What mass of iron, in grams, is formed when 725 kJ of heat is released?**
Express your answer in decimal notation rounded to three significant figures.
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