How to calculate the enthelpy change of a neutralization reaction

In summary, the conversation was about calculating the enthalpy change of a neutralization reaction between NaOH(aq) and HCl(aq). The standard enthalpy of neutralization for a strong acid and strong base is -13.7 kcal/mol, but the answer may vary depending on the data tables used. The process involves finding the enthalpy of formation for each compound and subtracting them to get the overall enthalpy change.
  • #1
stargazer
1
0
Chemistry Help-Enthalpy

Hi. I would very much like to know how to calculate the enthalpy change of a neutralization reaction, for example, NaOH(aq) and HCl(aq).
Thank you very much.
 
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  • #2
stargazer said:
Hi. I would very much like to know how to calculate the enthalpy change of a neutralization reaction, for example, NaOH(aq) and HCl(aq).
Thank you very much.

Strong acid + strong base has an enthalpy of neutrailzation = -13.7 Kcal

which is the case here
 
  • #3
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  • #4
Start from the standard elements in their most stable state at standard conditions. Unless the enthalpy of formation for each compound is provided to you already, it can be a bit complex. Here is an example...

http://groups.msn.com/GeneralChemistryHomework/general.msnw?action=get_message&mview=0&ID_Message=116&LastModified=4675466454162512526
 
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What is enthalpy change?

Enthalpy change is the difference in heat energy between the products and reactants in a chemical reaction. It can be either exothermic (releasing heat) or endothermic (absorbing heat).

What is a neutralization reaction?

A neutralization reaction is a type of chemical reaction between an acid and a base that results in the formation of a salt and water. It is also known as an acid-base reaction.

How do you calculate the enthalpy change of a neutralization reaction?

The enthalpy change of a neutralization reaction can be calculated by subtracting the enthalpy of the reactants from the enthalpy of the products. It can also be calculated using the formula ΔH = q/m, where q is the heat released or absorbed and m is the mass of the substance.

What factors can affect the enthalpy change of a neutralization reaction?

The concentration of the acid and base, the temperature, and the nature of the acid and base can all affect the enthalpy change of a neutralization reaction. For example, a higher concentration of acid and base can result in a larger enthalpy change.

Why is it important to calculate the enthalpy change of a neutralization reaction?

Calculating the enthalpy change of a neutralization reaction can provide valuable information about the energy changes that occur during the reaction. This can help in understanding the nature of the reaction and predicting its outcome. It is also important in industries such as pharmaceuticals and agriculture, where precise control of energy changes is necessary for the production of desired products.

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