The reaction of rusting iron and the heat produced

  • Thread starter George3
  • Start date
  • #1
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Homework Statement


4Fe+3O2=2Fe2O3 deltaH=-1.65 x 10^3kJ

If there are 15.7 grams of iron and 7.99 grams of oxygen, how much heat will be produced?


Homework Equations


Since Iron is the limiting reagent do I use that to determine the heat released?



The Attempt at a Solution


15.7gFe x 1molFe/55.9gFe x 1molFe/4molFe x -1.65x10^3kJ/1molFe = -116kJ
 

Answers and Replies

  • #2
Borek
Mentor
28,476
2,873
Looks OK to me, but think about sign. You are not asked about delta H for the reaction, but about amount of the heat released.
 

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