What is the Significance of Standard Enthalpy of Reaction?

In summary, the Standard Enthalpy of Reaction is the change in enthalpy that occurs during a chemical reaction when all reactants and products are in their standard states at a given temperature and pressure. It can be calculated by subtracting the sum of the standard enthalpies of formation of the reactants from the sum of the standard enthalpies of formation of the products. This information is important in understanding the energy changes involved in chemical reactions and can be used to predict the feasibility of a reaction. The Standard Enthalpy of Reaction is affected by various factors such as temperature, pressure, and concentrations of reactants and products. It is used in various industries to determine the energy requirements and efficiency of chemical processes, as well as in
  • #1
cnoa
5
0
http://en.wikipedia.org/wiki/Standard_enthalpy_of_reaction" of reactants (ΔHfO).

My question is, why?

And I also know that I can find http://en.wikipedia.org/wiki/Standard_enthalpy_of_reaction" (ΔHrO) by subtracting the bond energies of the reactants from the products. The result differs very little from the the first method.

Also, why is that?
 
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  • #2
My Answer to your First Question: The standard heat of formation of the reaction is like the "net" heat of the reaction which is "(final) minus (initial)", which is what that formula describes.
 

What is Standard Enthalpy of Reaction?

The Standard Enthalpy of Reaction, also known as the standard heat of reaction, is the change in enthalpy that occurs during a chemical reaction when all reactants and products are in their standard states at a given temperature and pressure.

How is Standard Enthalpy of Reaction calculated?

The Standard Enthalpy of Reaction can be calculated by subtracting the sum of the standard enthalpies of formation of the reactants from the sum of the standard enthalpies of formation of the products.

Why is Standard Enthalpy of Reaction important?

Standard Enthalpy of Reaction is important because it tells us the amount of heat released or absorbed during a chemical reaction. This information is crucial in understanding the energy changes involved in chemical reactions and can be used to predict the feasibility of a reaction.

What factors affect Standard Enthalpy of Reaction?

The Standard Enthalpy of Reaction is affected by the temperature, pressure, and concentrations of the reactants and products. Changes in any of these factors can alter the amount of heat released or absorbed during a reaction.

How is Standard Enthalpy of Reaction used in real life?

Standard Enthalpy of Reaction is used in various industries, such as pharmaceuticals, petrochemicals, and food production, to determine the energy requirements and efficiency of chemical processes. It is also used in the development of new materials and fuels.

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