Why Must HCl and NaOH Be at Equal Temperatures for Mixing in Experiments?

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HCl and NaOH must be at equal temperatures before mixing to ensure accurate measurement of the temperature change (ΔT) during the reaction, as any temperature difference could skew results. Accurate volume measurement of the liquids is crucial to maintain the stoichiometric balance in the reaction, which directly affects the heat produced and the overall results. The experiment likely involves calculating the heat transfer, making precise initial conditions essential. Without equal temperatures and accurate volumes, the experiment's data could lead to incorrect conclusions. Proper experimental setup is vital for reliable results in calorimetry.
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Calorimeter questions?

Homework Statement



I need help with answering some questions

A. Why do the temp of HCl and NaOH have to be essentially equal before mixing them?

B. Why is it necessary to measure the volumes of the liquids as accurately as possible?

Homework Equations





The Attempt at a Solution

 
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chemistry4all said:
A. Why do the temp of HCl and NaOH have to be essentially equal before mixing them?
I don't think I follow what your experiment is exactly. But let me guess. In part of the experiment, you are required to calculate a change in temperature. I'm guessing you'll measure a final temperature and compare that to the initial temperature to get ΔT. In other words, a final temperature relative to an initial... initial what?? An initial pair of temperatures ? Wait, what's wrong with that... :wink: :smile:
B. Why is it necessary to measure the volumes of the liquids as accurately as possible?
What/Why do you think?
 

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