Topic: Temperature

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• Topic Temperature Percent Error
• Do Now Look through the reference table, where
  would you look if
• you forgot what value nano hold
• you couldn'tt remember what quantity a Kelvin
  measured
• you needed the equation for density

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Temperature

• Scientifically speaking

Temperature is measure of average kinetic energy
of particles in system
Scientists use the Celsius and Kelvin
scale Where would you find how to convert
between the two?!?!
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Conversion formulas

• How can we convert from one temperature scale to
  another?
• K C 273 (more precisely 273.15)
• C K 273
• F (9/5 C) 32

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Absolute Zero

• Zero on the Kelvin scale point at which all
  matter is said to stop moving

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Worlds Record Cold Temperatures(note absolute
zero -273C)

• Date
  F C
• World (Antarctica) Vostok II 7/21/1983
  129 89
• Verkhoyansk, Russia (Siberia) 2/7/1892
  94 70
• Asia Oimekon, Russia 2/6/1933
  90 68
• Greenland Northice 1/9/1954
  87 66
• N.A. Snag, Yukon, Canada 2/3/1947
  81 63
• U.S. Prospect Creek, Alaska 1/23/1971
  80 62
• U.S. (other than AK)
• Rogers Pass, Mont.
  1/20/1954 70 56.5

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Percent Error

• ?measured value accepted value? x100

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Data table
Students were asked to find the density of
sucrose Sucrose has a density of 1.59 g/cm3
Calculate the percent error of each student to
the correct sig figs
8.18
3.14
8.81
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Advantage of Error

• Makes it easier to compare data, especially if
  comparing data from different trials