JenniferMurphy
Wellknown Member
 Joined
 Jul 23, 2011
 Messages
 2,309
 Office Version

 365
 Platform

 Windows
I have been experimenting with brewing tea at different temperatures. My usual practice is to heat water in a Pyrex in the microwave. By trial and error, I found that it takes about 34 minutes to bring 16 oz to a boil. But what if I want water at 180°?
So I took a few readings. Here are the results:
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As expected, the hotter the water gets, the more slowly the temperature increases.
I would like to come up with an equation based on this data that will allow me to calculate how many minutes to set the microwave for to get a specific temperature, like 180°.
The function would need to have a horizontal asymptote at 212°. For my data, it is more like 208°. By the time I get my little digital thermometer in the beaker, it has lost a few degrees.
I can't seem to come up with a way to fit a curve to this data. Can anyone help?
Thanks
So I took a few readings. Here are the results:
C/R  D  E  F  G  H 
3  Time  Water  Temperature  
4  (Min)  (oz)  Start  End  °/min 
5  3:00  16  66.7  179.5  37.6000 
6  2:30  16  70.0  168.2  39.2800 
7  2:00  16  72.0  153.7  40.8500 
8  1:30  16  69.1  136.9  45.2000 
9  1:00  16  66.7  116.4  49.7000 
10  68.9  Average 
<tbody>
</tbody>
As expected, the hotter the water gets, the more slowly the temperature increases.
I would like to come up with an equation based on this data that will allow me to calculate how many minutes to set the microwave for to get a specific temperature, like 180°.
The function would need to have a horizontal asymptote at 212°. For my data, it is more like 208°. By the time I get my little digital thermometer in the beaker, it has lost a few degrees.
I can't seem to come up with a way to fit a curve to this data. Can anyone help?
Thanks