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In Biology

Entropy is the measure of chaos or disorder in a closed system. For example: imagine an empty room with a single cup of tea (or coffee if you are American) on a table in the c…enter of the room. Imagine that the beverage starts it's life at 373 degrees Kelvin (the boiling point of water) and the room is at 300 degrees Kelvin (approx room temperature). If you were to observed how ordered the energy in this room is the cup of tea/coffee would be a highly organized body of energy. This is easiest to imagine if you try and see the room through a thermal imaging camera, the cup would appear very hot while the room would remain cold in comparison. Eventually however (as you may know from experience) leaving a hot drink out for long enough causes it to go cold and therefore undrinkable, if we were to watch this happen through our thermal imaging camera the temperature of the cup would decrease while the temperature of the room would increase very slightly until both are at the same level. This is because energy always moves from a more energetic body into a less energetic one and we rarely observe it going the other way round. It is possible that all the energy from the room could be transfered into the cup all of a sudden and make it white hot while the room freezes but it is so unlikely that we do not expect it to happen. In short entropy is a measure of the organization of energy in a closed system. If one were to observe the Earth you would see that entropy appears to be moving in reverse, energy is always being more organized. If you take into account the bigger picture that the Sun is the body providing that energy and is, in turn becoming more disordered, we see that eventually entropy always has it's way. You can liken entropy to the owner of a casino, he might get the odd winner in which case entropy is reversed, but in the end there are more losers than winners and so ultimately entropy stays in business. On a grand scale the universe is one such closed system and as Rudolf Clausius initially discovered, the rate of change in entropy in the universe is always higher than 0, so it never goes backwards overall, therefore eventually the universe will be so disordered that no energy can be used or collected without expending energy one doesn't have. This is known as the heat death of the universe and the concept can be summed up with the formula Îs universe > 0 . In simple terms , entropy is the measure of the level of disorder in a closed but changing system , a system in which energy can only be transferred in one direction from an ordered state to a disordered state. Higher the entropy, higher the disorder and lower the availability of the system's energy to do useful work . Although the concept of entropy originated in thermodynamics (as the 2nd law ) and statistical mechanics, it has found applications myriad of subjects such as communications , economics , information science and technology , linguistics, music. In day-to-day life it manifests in the state of chaos in a household or office when effort is not made to keep things in order Entropy is the explanation that a system goes towards a state ofdisorder. (MORE)

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In Biology

Answer Ice melting is a good example - energy is used to melt the ice but no work is done so it is sometimes called useless energy - check Wika Dictionary def. …Answer Take a bag of red marbles and a bag of blue marble and dump them together on a table top. You will notice that the marble mix together instead of segregating into coloured groups. This in entropy. (MORE)

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In Biology

There are macroscopic and microscopic examples of increasing entropy, all of which are also examples of increasing disorder and randomness. Macroscopic: Watch yourself get ol…d. Break something. Watch your tea get cold. In the study of thermodynamics and quantitative science, the examples usually involve the rearrangements of atoms and molecules inside matter and the change in entropy is given by dS=dQ/T. A good example is the melting of an ice cube. dQ is the energy (heat) it takes to melt the ice cube. (dQ=3334 Jules per gram or about 80 calories per gram). T is the absolute temperature of melting ice, usually 273 K. Now, this is not the whole story since the volume of the water and ice are different in normal daily life, and there are complexities of thermodynamics that are being skipped. Even so, ice melts, randomness of water molecules increases and entropy of the water increases. Another microscopic example can be given when you create magnetism in a metal like iron and the internal organization is made more organized and entropy of the iron decreases. (Or course, total entropy always increases, so entropy of the magnetization creating process must increase or it must give off heat.) (MORE)

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In Biology

It's not much use to give "examples of entropy"; it is an abstract concept that you must try to understand as such. Anyway, any matter that has heat energy, has entropy.

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In Chemistry

I am not sure whether you refer to delta S (change in entropy) or entropy itself. So I'll answer for both. For S (entropy), which is defined by the function S=kln(omega), wher…e k is Boltzmann's constant and omega is the number of microstates corresponding to a given state, the answer is no. Why? Omega (the number of microstates possible for a certain state) can never be smaller than one. Since Boltzmann's constant is a positive number and ln(omega) will always be greater or equal to zero, entropy will never be negative. However, when calculating delta S (change in entropy in a thermodynamic process), yes entropy can be negative. Remember entropy is essentially the state of disorder of a system since (on a macroscopic level) the natural progression of the world is from order to disorder. (For example, there are more ways to have a messy room than to have an impeccable, neat room). For the change in entropy to be negative just think of it in terms of the room analogy: initially, it was messy, but then it got neater. The state of disorder of things was lessened. Applying this to a chemistry example: CO 2 (g)--> CO 2 (s) An element/compound in a gaseous state always has a greater state of entropy (gaseous molecules are more free to move). However, an element/compound in a solid state has a smaller state of entropy because molecules in a solid are less free to move. Smaller state of entropy - greater state of entropy=negative entropy (MORE)

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In Chemistry

Disorder, chaos, and randomness are all synonyms for "entropy." The synonyms are only valid in certain areas or subjects. Disorder and chaos would fit better into thermodynami…cs, while the word randomness should be used when tackling topics such as the Information Theory. (MORE)

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In Chemistry

Enthalpy refers to the total energy content of the system. It is represented in thermodynamics as H=E+PV, where H refers to the total enthalpy of the system, E refers to the t…otal internal energy of the system, P referes to the pressure of the system and V refers to the volume of the system. Any change in any of these thermodynamic variables will result in change in enthalpy of the system. Entropy, as my friend had mentioned earlier, is a term for disorder in a system and that the overall entropy in a system always increases. (MORE)

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In Science

Entropy has to do with everything. The Laws of thermodynamics govern everything in the known universe.

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In Science

A physical quantity that is the measurement of the amount of disorder in a system.

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In my opinion entropy not only is disorder but also it attempt to make a new order by distribution of energy in universe.I want to prove this idea by a simple example. In my… view order is finding my socks easily and in the minimum of time every morning.If I want to reach to this aim opposite of of entropy trend I should be bought a hug number of socks that I can find my socks even with blindfolded. A house full of socks how can remember order?This manner even reduce probability of finding socks for others and destroy the social order.Entropy is preference everybody to somebody.In this view entropy is a trend to social justice. The above discussion of entropy is mostly an example of the extension of the concept of entropy from thermodynamics to analogous situations elsewhere. In statistical mechanics, the notions of order and disorder were introduced into the concept of entropy. From statistical mechanics it is possible to define and derive equations that exactly reproduce the thermodynamic equations for entropy and show that those equations match the values from traditional thermodynamics - hence they ARE the same function. Various thermodynamic processes now can be reduced to a description of the states of order of the initial systems, and therefore entropy becomes an expression of disorder or randomness. This idea of entropy being the same as disorder or randomness has been applied to describe phenomena at the macroscopic level. Unfortunately, the analogs are not perfect and not all the mathematics that apply to entropy in thermodynamics are valid for the macroscopic phenomena where the term is so loosely applied. (MORE)