Laws of Thermodynamics are not legal laws. they are laws of physics. these can not be broken.
The Heart of Gold was the prototype ship for infinite improbability travel. The principle is that as its drive reaches infinite improbability, the ship passes simultaneously through every point in the universe. It is then possible to decide at which point you actually want to be at when improbability levels decrease. Unfortunately human beings are not very well accustomed to not traveling at Normality (probability 1:1), and can be fairly distressed by events around them whilst the improbability drive is working: losing limbs, turning into penguins, planets spontaneously becoming fruitcakes, nuclear missiles metamorphosing into sperm whales and bowls of petunias, and so forth. The starship Heart of Gold was somewhat insulated against this by having an improbability-proof drive room, allowing the pilots to remain more or less normal during the flight
No evidence has ever been shown to contradict the Second Law and it is the most scientifically backed and proven statement ever made.
Is Entropy a Measure of "Disorder"?
Let us dispense with at least one popular myth: "Entropy is disorder" is a common enough assertion, but commonality does not make it right. Entropy is not "disorder", although the two can be related to one another. For a good lesson on the traps and pitfalls of trying to assert what entropy is, see Insight into entropy by Daniel F. Styer, American Journal of Physics 68(12): 1090-1096 (December 2000). Styer uses liquid crystals to illustrate examples of increased entropy accompanying increased "order", quite impossible in the entropy is disorder worldview. And also keep in mind that "order" is a subjective term, and as such it is subject to the whims of interpretation. This too mitigates against the idea that entropy and "disorder" are always the same, a fact well illustrated by Canadian physicist Doug Craigen, in his online essay "Entropy, God and Evolution".
smiley wrote:The problem is the definition of entropy itself. A lot of people define it as a degree of disorder. This is plain wrong. There are a number of experiments which show that order can increase with entropy. Yet somehow this concept seems to have embedded itself in the view of general public as well as in the scientific community.
The Second Law of Thermodynamics says that the disorder of the Universe can only increase in time, but the equations of classical and quantum mechanics, the laws that govern the behaviour of the very small, are time reversible. A few years ago, a tentative theoretical solution to this paradox was proposed - the so-called Fluctuation Theorem - stating that the chances of the Second Law being violated increases as the system in question gets smaller.
This means that at human scales, the Second Law dominates and machines only ever run in one direction. However, when working at molecular scales and over extremely short periods of time, things can take place in either direction. Now, scientists have demonstrated that principle experimentally. Professor Denis Evans and colleagues at the Research School of Chemistry at the Australian National University put 100 tiny beads into a water-filled container. They fired a laser beam at one of the beads, electrically charging the tiny particle and trapping it.
The container holding the beads was then moved from side to side a thousand times a second so that the trapped bead would be dragged first one way and then the other. The researchers discovered that in such a tiny system, entropy can sometimes decrease rather than increase. This effect was seen when the researchers looked at the bead's behaviour for a tenth of a second. Any longer and the effect was lost. This is the only known experiment that I am aware of. Care to share yours? Disproving 2nd Law consistency for a tenth of a second does not hold much hope for me in solving the issue of peak oil. And in this experiment, it seems that shaking the container was adding kenetic energy to the closed system. False results? Dunno...In our peak-oil macro world, 2nd Law cannot be questioned, nor is it. But it is discussed a lot as you assert, but given the ramifications, this is quite understandable, don't you think?Until a good definition of entropy is found the theory of thermodynamics is severely handicapped, in a sense that it is unable to describe or predict many of the processes which are so important to humans.
Applying this knowledge to nature, physicists found that the total entropy change (change in S) always increases for every naturally occurring event (within an isolated system) that could be then observed. Thus, they theorized, disorder must be continually augmenting evenly throughout the universe.
As i understand it one of the laws of thermodynamics is that you cannot 'create' energy , you cannot something for nothing....
If this is correct , surely none of us would be here?? Or is this the God versus science argument? Where did all the 'energy' come from in the first place if it wasn't created from
This argument is a very old one as it was first expressed by Albert Einstein. Unfortunately his argument was hijacked by the creationist bunch to justify their view of the creation. But the original argument does still hold. When you take in account the orbital theory and the hybridization of the atoms you can understand why ordered states are favored in cases of strong interaction.
Experimentally, chaotic systems are very hard to maintain. A small push will bring them to order. Nanoseconds after the big bang the universe was in ultimate disorder, a hot sphere of expanding gases. Yet a miniscule imperfection made the the universe evolve in the rather ordered state we know now. Chaotic systems only need a very small seed to resolve into order. The opposite is not true.
Experimentally, chaotic systems are very hard to maintain. A small push will bring them to order. Nanoseconds after the big bang the universe was in ultimate disorder, a hot sphere of expanding gases. Yet a miniscule imperfection made the the universe evolve in the rather ordered state we know now. Chaotic systems only need a very small seed to resolve into order. The opposite is not true.
How doeas one see that? Hybridization and orbitals aren't complexities, they don't even exist, exept in abstractitiy.
How? All you need is a gas in a tube. That is as far as I know a chaotic state, and what easy push would turn that into order? Same thing with an ocean, what easy push would you need?
Fluids can make a "phase transition" into more ordered states even while they are still fluid. The following experiment was first conducted in 1900 by Benard, with a tank which is taller than it wide, and with metal plates at top and bottom. Normally, liquid in the tank exists in a homogeneous state in which warmth is evenly distributed. If the tank is warmed gently through the bottom plate, then the heat spreads gradually, and forms a gradient, with the warmer liquid below and cooler liquid towards the top. These situations are states of stable equilibrium, or symmetry - that is, they are homogeneous in space and in time. There is no way of telling the difference between one place and another or one time and another.
However, if the bottom plate is heated to a certain threshold temperature, then the liquid re-organizes itself into a honeycomb of hexagonal convection cells known as Benard cells. In these cells liquid is rising on one side, and descending on the other. Convection cells are common in the earth's molten interior, in the atmosphere, and in the sun.
How is the universe today more orderly? It's simply fizzling out, using the energy it had such a long time ago. Galaxies? Have you ever read Chaos Theory, and about tendencies towards small orderly states within chaotic ones?
You can measure bond angles and you can measure orbitals. There are various methods available such as NMR, IR, neutron diffraction, mossbauer spectroscopy and luminescence spectroscopy to do so. We cannot locate the exact position, direction and velocity of the electron in the orbital, but we can say they exist.
But even then you can induce a high degree of order in a gas. One example is a tornado which is characterized by a high degree of order and strong interactions between the air molecules. A tornado is thus an event with an extreme low probability, which forms almost spontaneously
What's the chaotic region then? The end result of the universe "fizzling out" would be that all the matter is contained in suns, planets, black holes etc. These lumps of matter would be contained in an absolute vacuum. That would be the equivalent of all the gas in your tube coagulated in one small spot. I would call that an extremely improbable event if you adhere to the Clausius theorem.
Kingcoal wrote:There is only one problem with this thread. None of the people who really need a lesson in elementary physics is here listening! I've seen all kinds of posts about air powered cars, ZPE, etc. They need to get into this discussion. My position on Peak Oil is that we need to conserve, period. I gave up fighting the laws of physics years ago!
The author of this thread wishes to present a discussion of the laws of thermodynamics for the layman, to help in the understanding of the resource and energy balance throughout the universe and the micro cosmos we call earth. The discussion will demonstrate the applicability of the laws of thermodynamics from the test tube to the beginning of the universe, often with simple and practical examples.
There are a number of experiments which show that order can increase with entropy.
Until a good definition of entropy is found the theory of thermodynamics is severely handicapped, in a sense that it is unable to describe or predict many of the processes which are so important to humans.
Users browsing this forum: No registered users and 266 guests