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Unformatted text preview: nstant within a wide range of temperature, therefore it is treated
as calorically perfect gas, for which, e and h can be written as: Discussion:
and
are actually impossible to be constants in the range of (0, ~300K),
however, we never dealt with the and , we only interested in there change,
(in a
relatively high temperature range, at which,
and
are relatively constant). That
means:
and
are still valid.
Useful relations:
definition
, 1st Law of Thermodynamics (Conservation of Engergy)
“Energy can be transformed (changed from one form to another), but cannot be created or
destroyed”. For a stationary system:
where
process, SHU Fall 2012 are heat transferred or work done to the system. For reversible 2 Thermodynamics (Review) LEC 2 Entropy and 2nd Law of Thermodynamics
Entropy is a macroscopic property of a system that is a measure of the microscopic
disorder within the system. For a reversed process, it is defined as:
∫
2nd Law of thermodynamics: In general the total entropy of any system will not
decrease other than by increasing the entropy of some other system. Hence, in a sys...
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This note was uploaded on 09/03/2013 for the course AE 339 taught by Professor Wei during the Fall '12 term at NMSU.
 Fall '12
 Wei

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