All too often, courses in thermodynamics and statistical mechanics barrage their students with numerous equations that are left unexamined and uninvestigated. This note explains how to pause, examine a thermodynamic equation, and render it more meaningful. Three techniques are discussed: (1) design two experiments that would measure the quantities on either side of the equality; (2) examine special cases; (3) consider the consequences if the equality failed to hold.
REFERENCES
1.
Robert H.
Romer
, “Reading the equations and confronting the phenomena—The delights and dilemmas of physics teaching
,” Am. J. Phys.
61
, 128
–142
(1993
).2.
Daniel F.
Styer
, “Guest Comment: Getting there is half the fun
,” Am. J. Phys.
66
, 105
–106
(1998
).3.
Jeffrey J.
Prentis
, “Equation poems
,” Am. J. Phys.
64
, 532
–538
(1996
).4.
Robert E.
Kelly
, “Thermodynamics of blackbody radiation
,” Am. J. Phys.
49
, 714
–719
(1981
).5.
Philip Morrison, Nothing Is Too Wonderful To Be True (American Institute of Physics Press, Woodbury, NY, 1995).
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© 1999 American Association of Physics Teachers.
1999
American Association of Physics Teachers
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