- #1
capcom1983
- 26
- 0
I was thinking maybe the universe isn't in the chaotic state its meant be in. Rather a more organised state and the universe is still in it's younger years. This is just a thought any insight would be great.
What mordred saidDrakkith said:It would help very much if you were a little clearer with what you are asking. When you say "the chaotic state its meant to be in", what exactly do you mean by this? What reasons are there for the universe to be in any other state than its current one?
I was thinking maybe the universe is relativly new. That's why the universe expansion is accelerating rather than deccelerating.
Naty1 said:A .
In addition, I suspect the expansion is not quite what you think it is...
.
While there is some relationship between chaos/disorder and entropy, the problem is that the former terms are colloquial terms that are very non-specific, and may lead people to incorrect conclusions.capcom1983 said:I was thinking maybe the universe isn't in the chaotic state its meant be in. Rather a more organised state and the universe is still in it's younger years. This is just a thought any insight would be great.
Chalnoth said:While there is some relationship between chaos/disorder and entropy, the problem is that the former terms are colloquial terms that are very non-specific, and may lead people to incorrect conclusions.
For example, consider a room with air in it, with the air in two different configurations. In each configuration, the air has the exact same amount of total energy, and there are the exact same number of molecules. The difference is on where the molecules are:
1. In the first configuration, the air molecules are spread out almost evenly. If you pick any two cubic centimeters of air in the room, the number of molecules in each cubic centimeter is likely to vary by less than one in a billion.
2. In the other configuration, the air molecules are gathered in clumps, so that one cubic centimeter of air might have a million times as many molecules than another.
Which of the two configuration seems to be more chaotic and disordered? Presumably you would answer configuration 2. But it is configuration 1 that has the higher entropy (much higher, as it turns out, as evidenced by the fact that we never run into a room like number 2).
As for the universe as a whole, the eventual, maximal-entropy configuration appears to be empty space.
Entropy can be used equally-well in both open and closed systems. The main difficulty with using entropy in cosmology in any sort of detailed manner is the fact that we don't know how to write down the entropy for a general self-gravitating system. But we do know the entropy of a few specific self-gravitating systems. For example, we know the entropy of a black hole, and the entropy of an empty de Sitter universe. These are small, special cases, but they still give us some understanding of entropy in our universe.Mordred said:I would would be curious on how some of the views of this paper have been resolved into more current cosmology entropy usage and definition. For example entropy in the second law of thermodynamics is a closed system. So how is it used in cosmology which could be an open or closed system globally ?
Entropy is a measure of the disorder or randomness of a system. In the universe, entropy is constantly increasing as energy is dispersed and systems become more disordered.
As entropy increases, the universe moves towards a state of maximum disorder. This means that over time, the universe will become more chaotic and less organized.
According to the second law of thermodynamics, entropy cannot decrease in a closed system. However, local decreases in entropy are possible with the input of energy, such as in living organisms.
Entropy is closely related to the concept of the arrow of time, which describes the one-way direction of time in the universe. As entropy increases, time moves forward and systems become increasingly disordered.
Some examples of entropy in action include the spread of heat in a room, the breakdown of complex molecules in food, and the eventual heat death of the universe. Entropy can also be seen in everyday phenomena like the melting of ice cubes or the rusting of metal.