The reaction of rusting iron and the heat produced

In summary, rusting iron is a chemical process that produces heat through the reaction of iron and oxygen. The rate of rusting and heat production is affected by temperature, with higher temperatures leading to a faster reaction and more heat being released. The heat produced is typically not dangerous, but can be harnessed and used as a source of energy in certain situations.
  • #1
George3
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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
 
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  • #2
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.
 
  • #3


Yes, you are correct in using iron as the limiting reagent to determine the amount of heat released. Your calculation seems to be correct as well. However, it would be helpful to include units in your final answer (-116 kJ). Additionally, it may be beneficial to explain the steps of your calculation for a clearer understanding. Overall, your response demonstrates a good understanding of stoichiometry and energy changes in chemical reactions.
 

1. What is the reaction of rusting iron and how does it produce heat?

The reaction of rusting iron is a chemical process called oxidation, in which iron combines with oxygen from the air to form rust. This reaction is exothermic, meaning it releases heat in the process.

2. How does the temperature affect the rate of rusting iron and the heat produced?

The rate of rusting iron and the heat produced are directly affected by the temperature. Higher temperatures increase the rate of the chemical reaction, resulting in more heat being produced. This is why objects made of iron tend to rust more quickly in hot and humid environments.

3. What happens to the heat produced during the reaction of rusting iron?

The heat produced during the reaction of rusting iron is released into the surrounding environment. This can be seen as an increase in temperature in the immediate area around the rusting object. In large-scale industrial processes, this heat can be harnessed and used for various purposes.

4. Is the heat produced during the reaction of rusting iron dangerous?

The heat produced during the reaction of rusting iron is not typically dangerous, as it is a slow and gradual process. However, in certain situations where large amounts of iron are rapidly rusting, such as in a confined space, the heat produced can cause a fire hazard.

5. Can the heat produced by rusting iron be used as a source of energy?

Yes, the heat produced by rusting iron can be harnessed and used as a source of energy. In fact, some researchers are exploring ways to use the energy from rusting iron to power small electronic devices or even larger-scale applications such as heating homes. However, this technology is still in the early stages of development.

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