How Do We Tell Temperature?

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Reactions Science Videos | March 28, 2017

We have a lot of confidence that we measure temperature accurately. But how do thermometers in the kitchen or doctor’s office work? Thanks to the laws of thermodynamics, thermometers respond to heat moving from hot to cold as a means of measuring temperature. Clever physical chemists and engineers have taken temperature tools from the simple, but still useful, lined glass thermometers to digital readouts. And you might be surprised to find out how Einstein took thermometers the distance.

Sources:
Fever Guidelines
https://www.cdc.gov/quarantine/air/re...
http://www.mayoclinic.org/first-aid/f...
http://highschoolenergy.acs.org/conte...
http://theinventors.org/library/inven...

Galileo Project (Rice Univ.) - Thermometer http://galileo.rice.edu/sci/instrumen...

EPA - Mercury in your thermometer
https://www.epa.gov/mercury/mercury-t...
EPA - Mercury - Health Effects
https://www.epa.gov/mercury/health-ef...
NIST - phasing out mercury thermometer calibration
https://www.nist.gov/news-events/news...

Galilean Thermometer not so Galilean (interesting, but also corroborates the event of Galileo’s invention of the thermoscope around the start of the 17th century)
http://pubs.acs.org/doi/abs/10.1021/e...

Bimetallic thermometers
http://www.teltru.com/topic.aspx?name...

thermocouples
http://www.msm.cam.ac.uk/utc/thermoco...

thermistors
https://www.nist.gov/pml/mercury-ther...
http://www.radio-electronics.com/info...

IR semiconductor sensors
https://www.noao.edu/meetings/gdw/fil...

IR planet measurement
https://geosci.uchicago.edu/~rtp1/pap...
https://www.acs.org/content/acs/en/cl...

“Experiments in Physical Chemistry”, 6th edition. David P. Shoemaker, Carl W. Garland, Joseph W. Nibler. McGraw-Hill, 1996.
Chapter 18 “Temperature” and Chapter 19 “Instruments”

 

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