How to calculate the enthelpy change of a neutralization reaction

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Homework Help Overview

The discussion revolves around calculating the enthalpy change of a neutralization reaction, specifically between sodium hydroxide (NaOH) and hydrochloric acid (HCl). Participants are exploring the concept of enthalpy in the context of chemistry.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants present different calculations for the enthalpy change, referencing data tables and providing specific numerical values. Some question the standard values used in their calculations and the complexity of determining enthalpy of formation.

Discussion Status

The discussion is active, with participants sharing different results and methodologies. Some guidance has been offered regarding starting points for calculations, but there is no clear consensus on the correct approach or values.

Contextual Notes

There is mention of needing enthalpy of formation data for accurate calculations, which may not be readily available to all participants. Additionally, the discussion includes varying units (Kcal and KJ), which may contribute to the differences in results.

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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.
 
Last edited:
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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
 
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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