Finding ∆T using cooling curve correction
Автор: PhysChem with Liz
Загружено: 2022-01-16
Просмотров: 747
Описание:
This video demonstrates, using example student results, how to find a change in temperature using the cooling curve correction method.
Note - these are not 'perfect' results, just an example similar to what you may obtain, to demonstrate how to do this :)
The temperature was measured each 30 seconds for 2.5 minutes to ensure it was stable, then zinc was added to a solution of copper sulfate at 3.0 minutes. No temperature reading was taken at 3.0 minutes due to the temperature changing so rapidly at this time.
Heat loss is a significant error in these kinds of practicals, so rather than using our highest and lowest recorded temperatures and subtracting these, we can find our temperature change graphically by extrapolating to the point at which the zinc was added, for a more accurate ∆T.
Credits:
Thanks to Ellie P, these are her results from class
Music: Mangoe
Musician: Jeff Kaale
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