Thermodynamics 2 Entropy


M106-HST-Lgendler

A collection of rembrandts self-portraits serve as an illustration of the passage of time

When left to itself snow spontaneously would never build a snowman.
It will only form different kinds of heaps . This can be undestood as the consequence of statistics: There are more possible arrangements of  the atoms constituting the snow leading to unordered heaps than arrangements resulting in the much more ordered state of a snowman,.

This cicumstance can be described with the concept of statistical weight.

The statistical weight (is the number of microscopic states(ways of arranging the atoms) %omega;corresponding to a certain macroscopic state(the large scale object).
The entropy, S, is defined as
S = k ln Ω
It is a measure of the disorder of the system. In all spontaneous processes the entropy increases because statistically the state with the greatest statistical Weight is more probable.
Such a process is irreversible.

In an adiabatic process no Heath is exchanged with The surroundings.

Annonser

Om mattelararen

Licentiate of Philosophy in atomic Physics Master of Science in Physics
Det här inlägget postades i Calculus, Gymnasiefysik(high school physics), Thermodynamics och har märkts med etiketterna , . Bokmärk permalänken.

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