Questions About the Formation of Hydrochloric Acid

In summary, the conversation discusses the energy dissipated during the formation of hydrochloric acid through a photochemical reaction. It also touches on the exothermic energy involved and the intensity of light required to activate the reaction, as well as the energy needed to separate H2 and Cl2 from a solution of HCl through electrolysis. The conversation also mentions the experimental nature of endothermic and exothermic energies and suggests using the CRC handbook for data. The bond energies of Cl_2 and H_2 are mentioned as a way to determine the activation energy, and the bond energy of HCl is mentioned for calculating the exothermic energy. Lastly, the conversation references a reduction table for finding the voltage values for the electrolytic
  • #1
avinash
3
0
Got a question about the energy dissipated during the formation of hydrochloric acid, upon the reaction of hydrogen and chlorine (photochemical reaction). Whats the exothermic energy involved and the intensity of light needed to activate this reaction, in other words the activation energy. And what would be the enrgy required to separate H2 and Cl2 from a solution of HCl by electrolytic process?
thnx let me know soon.
 
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  • #2
are you sure this is a physics question? I believe that this is more general chemistry.
the endothermic and exothermic energies are all derived experimentally. this means they are not always the same. There are too many factors that affect it like pressure and temperature (eg. when it's 110*C out you need to add less heat than when it's -30 degrees out). You could try the CRC handbook to get these data. :)
 
  • #3
You simply need to find the bond energies of [itex]Cl_2, H_2 [/itex]. Add these two up, I believe that it'll be the activation energy. What light energy corresponds to this energy; you should definitely know this.

To find the exothermic energy, you'll need to incorporate the bond energy of HCl. Draw the process out. You've got diatomic gases, you dissociate them, then these species reassociate.

The electrolytic aspect pertains to free energy. You can find the voltage values of each of the reactions I mentioned and work from there.
 
  • #4
thanx a lot I am sure that will help
 

1. How is hydrochloric acid formed?

Hydrochloric acid is formed through the reaction of hydrogen gas (H2) and chlorine gas (Cl2). This reaction takes place in the presence of a catalyst, typically iron or platinum, and high temperatures.

2. What are the properties of hydrochloric acid?

Hydrochloric acid is a colorless, highly corrosive and strong acid. It has a pungent odor and can cause severe burns on contact with skin. It is also highly soluble in water and can be used as a disinfectant and industrial chemical.

3. What is the chemical formula for hydrochloric acid?

The chemical formula for hydrochloric acid is HCl. This means that it is composed of one hydrogen atom and one chlorine atom.

4. How is hydrochloric acid used in industry?

Hydrochloric acid is used in a variety of industries, including pharmaceuticals, food processing, and metal cleaning. It is also used in the production of PVC, fertilizers, and dyes. In addition, it is commonly used in the process of pickling steel to remove impurities.

5. Is hydrochloric acid harmful to the environment?

Hydrochloric acid can be harmful to the environment if it is released in large quantities. However, it is a naturally occurring compound in the human body and does not typically pose a threat to the environment in small amounts. Industrial use of hydrochloric acid is heavily regulated to prevent harm to the environment.

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