3) Getting Numbers from that Data
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Transcript of 3) Getting Numbers from that Data
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Getting Data From SpectraFirst Lets Make Sure:
We Are All On The Same Page
Bruce Phebus
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What you should have:If you don’t you are way Behind!• Wavelengths calculated for all the peaks
on your spectrum• Peaks assigned to R and P branches
J” & J’ values assigned to each peak.• All your data organized, labeled, and given
to your lab partners.
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Ahh now to Linest!
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What are we doing to today?
• We will calculate all of our constants!ωe ωexe Be α
• We will have reduced mass, μ, for each of our isotopes H79Br & H81Br
• Isotopic abundance Br 79 is 50.7%• Isotopic abundance Br 81 is 49.3%
Label 79 and 81 peaks• Uncertainties as well
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What are we doing to today continued…
• We will calculate all of our constants!k = The spring constantDe
o = Dissociation EnergyRe = Bond length
• Shaowei’s slides have the equations!“Data Analysis and Lab Report”
• Note k and k the Boltzmann constant are not the same even though they look it on his slides!
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Questions Ask Them!• Make sure you keep up with
the pace of the class as we don’t meet often falling behind one day means falling behind a week!
• Do Differential Error Prop Now!
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On the Subject of Reff’s:• You need to look up references for
your reports–They are a graded portion of your
report• A hint for the HBr report “T.A. Ford”
– Very handy but you can’t use the reference.– “A third year chemistry project” doesn’t count
as citation worthy science. You figure it out.
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Next Week:• You should not be doing data
analysis you should be writing and making certain your data is correct.