Wednesday 1 February 2012

Entropy

"All genius is a conquering of chaos and mystery. "
Otto Weininger

Entropy is the dispersal of energy and particles in the material world, which can also be seen as a concept that the universe naturally creates order from chaos as entropy measures the amount of 'disorder' in the universe and is thus a function which the world as we know it would not work without. Imagine a world where throwing a pile of building blocks results in them stacked into perfect form? Imagine a world where shaking a box of separated jigsaw pieces could yield a perfect jigsaw?

A world where the line between cause and effect is almost blurred.

The second law of thermodynamics tells us that disorder in the universe increases as time goes on. This is a loss of information - and in the case of the diagram this would be the arrangement of particles. Even though it is a simple 9x9 arrangement this arrangement would be unlikely in an isolated system. Diffusion in the system slowly shows us the information lost as the arrangement of particles in the diffusion situation becomes gradually lost. As time passes entropy increases. Eventually the information will be completely lost as the particles are diffused and they no longer belong to the distinct pattern.
This can also show the entropy of the universe on a macroscopic scale; when all the stars eventually give up their heat the temperature will be the same everywhere in the universe - 'maximum entropy'.
Without these laws the world; and universe, would not function the way it does.
Entropy also works with energy as well as particles - for example in a glass of ice water the heat will flow from hot to cold never the other way. 
Through entropy there is always more disorder, broken objects plates do not reverse the breaking process and re-assemble themselves just as particles do not choose to ignore the gradient of diffusion.

But what if we just make another plate? Will the order not be more than the disorder?

By manufacturing another plate raw materials must be collected and transformed into what is needed so overall entropy increases and the second law of thermodynamics is not broken!

Thanks for reading this post on entropy, Chris

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