lec14-203-11-temp-phasespost

lec14-203-11-temp-phasespost - T (K or C) G L S Q Q...

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Q T (K or C) G L S 14-0 Q (quant.) C T Q (quant.) Phase change Temperature change
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How do we keep track of energy when it is distributed over many, many [~10 23 ] objects that are constantly exchanging energy? Temperature is a measure of the average energy per molecule. High average speed High energy per molecule High T Low average speed Low energy per molecule Low T Temperature Measure o K : o C : o F 14-1 http://phet.colorado.edu/simulations/sims.php?sim=Gas_Properties http://www.falstad.com/gas/
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In the 18 th century, some erroneously believed that an object certain amount of “heat fluid” or caloric that could flow from one place to another. Benjamin Thomas (1753-1814) A.K.A Count Rumford observed the heat generated from the boring of cannon barrels by large drills. James Prescott Joule (1818-1889) quantitatively measured the increased temperature done by mechanical energy. James Joule’s Experiment => Energy is Conserved Heat & Mechanical Work (background) 14-2
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A B Separated, but in thermal contact In Thermal Contact after a long period T (in thermal Equilibrium) T c < T < T h Equilibrium established by heat flow, Q, from hotter to colder system B Q T h T c “hotter” “colder” A < Definition: Heat is the energy transferred between objects due to a temperature difference.
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This note was uploaded on 04/03/2012 for the course PHY 1020 taught by Professor Kodera during the Spring '11 term at University of Florida.

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lec14-203-11-temp-phasespost - T (K or C) G L S Q Q...

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