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Topic: How do I extrapolate the linear portion of the curve to find T[sub]f[/sub]  (Read 6372 times)

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Offline meghan

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I am given a chart listing temperature and time. 

Time (min)     Temp (Celsius)
0.0               23.3
1.0               27.8
2.0               28.4
3.0               28.5
4.0               28.5
5.0               28.4
6.0               28.3
7.0               28.3

I graphed the time and temperature (on good old graph paper).  My next step is to "extrapolate the linear portion of the graph and determine Tf."  I also need to solve for :delta: T.  This is a pre-lab question so there is no other information provided.  I'm really lost on what to do for this.  This material is from Chapter 8 and we're only on Chapter 6 and I can't seem to find further direction from my text. 

I appreciate any guidance on how to move forward.  Thank you so much in advance!   

Offline BetaAmyloid

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Re: How do I extrapolate the linear portion of the curve to find T[sub]f[/sub]
« Reply #1 on: November 11, 2009, 11:04:01 PM »
You have to calculate a line of best fit or through using statistics by a LSRL (Least Squares Regression Line). It is an approximate calculation, so in your lab report, be sure to say that the graph is extrapolated and therefore theoretical.
Discovery consists of seeing what everybody has seen and thinking what nobody has thought - Albert Szent-Györgyi

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