Error in Calculation of EDissolution?

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SUMMARY

The calculation of Edissolution for a reaction resulted in a negative value, which contradicts the observed endothermic nature of the reaction indicated by a temperature drop. The equation used was ∆Edissolution = Ccup∆Tcup/mass of salt. The negative result should not be interpreted as an indication of an exothermic reaction; rather, it reflects the temperature change associated with the dissolution process. Understanding the relationship between temperature changes and reaction enthalpy is crucial for accurate thermodynamic assessments.

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Aileen Gordola
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I calculated the Edissolution of a reaction and resulted in a negative number. However, during the wet lab the reaction was clearly endothermic since there was a drop in temperature. I used the equation:

∆Edissolution = Ccup∆Tcup/mass of salt

What is the reason for the negative number? Would i consider the negative sign as a mere drop in temperature and not as a factor contributing as to wether the reaction is endothermic or exothermic?
 
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Aileen Gordola said:
I calculated the Edissolution of a reaction and resulted in a negative number.
Can you show us this calculation, please?
Aileen Gordola said:
wether the reaction is endothermic or exothermic?
What do you know about endothermic and exothermic reactions?
 

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