Entropy And The Second Law Of Thermodynamics

Entropy And The Second Law Of Thermodynamics The paper examines, explain clearly, rigorously the term entropy, then discuss and evaluate its meaning in the context of the second law of thermodynamics. Also It will give a historical overview of the term entropy and it will give some examples which are taken from the daily life and with these, I will try to explain clearly the term entropy and its intention not only in the context of the second law and also its results in our daily life. 2. Introduction (Appendices A.) The term entropy has some related definitions. The first definition used by the German physicist Rodolf Julius Clausius in the 1850s and 1860s, he did that to state the second law of thermodynamics. The word entropy has been taken from the Greek word Ï„Ï ÃŽ ¿Ãâ‚¬ÃŽ · which means transformation. Also just as the first law of thermodynamics leads to the definition of energy as a property of a system, so the second law, in the form of Clausius inequality, leads to the definition of a new property of fundamental importance. This property is entropy. In the 1870s the term entropy is given by J. Willard Gibbs. The meaning of what he says is that the entropy shows the uncertainly about the state of a system. The latter can be defining from the probability distribution of its micro-states which demostrates, all molecular details about the system such as the position and the velocity of every molecule. If Pi is the possibility of a micro-state i, then the entropy of the system can be ex pressed by S = -k ÃŽ £ Pi ln Pi Where k is the Boltzmann constant equal to 1.38062 x10^(−23) joule/kelvin. Another definition, is the statistical definition developed by Ludwig Boltzmann in 1870s. This definition, describes the entropy as a measure of the number of possible microscopic configurations of the individual atoms, and molecules of the system; which would give rise to the observed macroscopic state of the system. In statistical thermodynamics, Boltzmanns equation, is a possibility equation relating the Entropy S of an ideal gas to quantity W, which is the number of micro-states corresponding to a given macro-state: S = k log W Where k is Boltzmanns equal to 1.38062 x10^ (−23) joule/kelvin. Boltzmann has proved that the entropy of a given state of thermodynamic al system is connected by a simple relationship to the probability of the state. According to M. Kostic(2004): Entropy is an integral measure of (random) thermal energy redistribution (due to heat transfer or irreversible heat generation) within a system mass and/or space (during system expansion), per absolute temperature level. Entropy is increasing from perfectly-ordered (singular and unique) crystalline structure at zero absolute temperature (zero reference) during reversible heating (entropy transfer) and entropy generation during irreversible energy conversion (lost of work-potential to thermal energy), i.e. energy degradation or random equip-partition within system material structure and space per absolute temperature level. 3. Entropy measures the disorder in a system (Appendices B.) Therefore, metaphorically if a small bookshelf getting disorganized, it will be increasing the entropy of the bookshelf. Because, when the bookshelf is properly organized, finding a book is predictable and easy because all books are in a nice order. As the bookshelf is getting disorganized, the chance of not finding a book increasing, as a result is much higher. So that, when a bookshelf, a room a house are organized and they are moved from being organized to being disorganized, they generate Entropy. Also, liquids have higher entropy than crystals intuitively because their atomic positions are less orderly. Calculating the entropy of mixing illustrates this interpretation. An example is with scrambling eggs because when we mix the yolk and the white we cannot re-separate after. An example from this situation are given in figures 1.1 and 1,2. V V 2V Fig. 1.1 Unmixed atoms. The premixed Fig. 1.2 Mixed atoms. The mixed state: N/2 state: N/2 white atoms on one side, N/2 mixed atoms and N/2 black atoms scattered black atoms on the other. Through the volume, 2V. Fig. 1.1 There are N/2 undistinguished ideal gas white atoms on one side and N/2 undistinguished gas black atoms on the other side. As a result, the entropy of this system: Sunmixed = 2kB log[V N/2/(N/2)] Twice the configurational entropy of N/2 undistinguished atoms in a volume V. We assume that the black and white atoms have the same masses and the same total energy. Now the entropy change when the partition is removed, as a result from the scrambling and the two sets of atoms allowed mixing. Because, the temperatures and pressures from the both sides are equal and when the partition removing does not involve any heat transfer, and the entropy change to the mixing of the white and black atoms. In desegregated state, the entropy has increased to Smixed = 2kB log[(2V )N/2/(N/2)] and it is: ΔSmixing = Smixed − Sunmixed = =2kB log[[V^N/2/(N/2)] / [(2V)^N/2/(N/2)] = =kB log 2N = NkB log 2 So that, it gain kB log 2 in entropy every time we place an atom into one of the boxes. James P. Sethna (2006) Furthermore, we can give another example which shows us that entropy measures the disorder in a system: Which is more disorder? The glass of ice chips or the glass of water? For a glass of water, the number of molecules is astronomical. The ice chips probable look more disorder when we compare to the glass of water which looks uniform. However, according to thermodynamics the ice chips place limits on the number of ways the molecules can be arranged. The water molecules in the glass can be arranged in many more ways; as a result, they have grater multiplicity and therefore greater entropy. 4. Entropy measures our ignorance in a system The most general is to measure our ignorance about a system. The equilibrium state of a system, maximizes the entropy because, we have lost all information about the initial conditions, as a result, the entropy maximizing immediately maximises and our ignorance about the details of the system. 5. Entropy measures the multiplicity of a system The probability of finding a system in a given state depends upon the multiplicity of that state. As a result it is proportional to the number of ways someone can produce that state. Here, it is a pair of dices, and in throwing this pair, that measurable property is the sum of the number of dots which are facing on the top. The multiplicity for two dots showing is just one because there is only one case of the pair that will give that state. For example, the multiplicity for seven dots is six, because there is six cases of the pair that will show a total of seven dots. Probable one way to define the quantity entropy is to do it in terms of the multiplicity. Multiplicity = W Entropy = k lnW Where K is Boltzmanns constant. For a system, of a large number of particles. We can expect that the system at equilibrium will be found in the state of highest multiplicity since the fluctuations from that the state will usually be extremely small to measure. As a result, as a large system approaches equilibrium, its multiplicity therefore, entropy tends obviously to increase. This is one way of stating the Second Law of Thermodynamic. 6. The Second Law of Thermodynamics (Appendices C.) The second law of thermodynamics states that heat flows always from the warmer to colder bodies and never opposite. This is a common experience which everyone has seen and probably every day we have a case of those. For example, whenever we leave a cup of warm coffee it will become cool in 10 minutes. The special point of this process is that by the end of years can never become backward. It has just one direction as time passes. Indeed, through our everyday experience know that when contacting a hot and a cold body will be transferred heat from the hot to the cold body, so the hot body will be a little cooler and the cold body the opposite will be a little bit hotter. However, it is never possible as the time passes and the two bodies are in contact the cold body to be colder and the hot body to be hotter, for example, if we put an ice-cube into our drink, the drink does not boil. Therefore, it is only one direction in the flow heat which if we displaced it with a line, then this li ne will show everything from the past to now and to future. The second law of thermodynamics states that heat cannot be transferred from a colder to a hotter body within a system net changes occurring in other bodies within that system, in any irreversible process, entropy always increases. In nowadays, it is customary to use the term entropy in conjunction with the second law of thermodynamic. Consequently the entropy indicates the unavailable energy of a system, according to the law the entropy of a closed system can never reduce. Another form of the second law thermodynamic says that the minimum amount of heat which exchange a system during a change, which takes place at constant temperature T, associated with a change which is called entropy, with the equation: dQ=

Technolgy and Bullying

Technology and Bullying BY beverage Thesis Statement Cyber Bullying is the modern way to bully. Cyber Bullying is a growing issue in America. Cyber Bullying affects both genders and all culture groups. Due to the onset of suicides and homicides America is taking a stand against cyber bullying. Introduction/Body Peer to peer bullying has been going on for quite some time. My mother use to tell me â€Å"sticks and stones may break your bones, but names will never hurt me† .Even then I am not sure that I totally agreed with her. Now as an adult In today's society, I am sure I do not agree. The times have changed since new technology has made it possible for young people to bully one another without even having to be face to face. Teens often turn devices into â€Å"weapons† through the use of social networking websites, chat rooms and text messaging Just to name a few. Through these devices they call each other names, belittle, video and threaten kids to in some cases the point of suicide.Since the onset of Cyber Bullying a word named cybercafà © has been created to depict the epidemic of suicides related to Cyber Bullying (Belles 2004). Element of he Pew Internet and American Life Survey in 2006 stated that girls are more likely to be cyber bullied then boys. Element further stated that girls between the ages of 15-17 years old are at the most risk of cyber bullying. Lastly Element found that 50% of all social network users have been cyber bullied and as little as 10% have report the crime to their parents.Wesley Fryer of the Texas Computer Associations describes cyber buying as impersonating and constant blobbing of a person. Fryer further states that most cyber bullies have no idea the harm the they are doing a simple parent intervention old stop the bullying without further intervention. Fryer further states the massive media attention and strict penalties of repeater offenders of Cyber Bullying is sure to restore trust in the online community p ertaining to adolescents.In conclusion the evidence shows that cyber bulling is a problem which needs to be addressed by the parent and the public at large to be deterred. I believe it's important to be educated about Cyber Belling because it will help deter bullying from happening, it will also show bullies Just what reactions they are causing to the victims notionally, and will show kids who are being bullied that it is k to talk to an adult about it.

Harry Houdini

Sarah Busi Ms. Roach Honors American Literature 12 March 2013 Harry Houdini: World’s Greatest Magician â€Å"Remembered for his ability to escape from bonds and containers, Houdini is the world’s most famous magician, and his name is instantly recognized, although he died over 70 years ago† (â€Å"Harry 1†). Harry Houdini was much more than any ordinary magician a mother might hire for their child’s birthday party. When one thinks of Harry Houdini, the furthest thing from their mind would be the cliched pulling a rabbit out of a hat or amateur card tricks.Houdini forced his audience to question reality with his outstanding and incomprehensible ability to make the impossible possible. During the 1920s, crime, gangster activity, and racial discrimination were at their peak, but Harry Houdini was able to offset some of those harsh realities by entertaining and fascinating people using the mystery and illusion of his magic tricks. Harry Houdini’s early life influenced and sparked his interest in entertainment and magic.The Weiss family, consisting of Mayer Samuel, Cecilia Steiner Weiss, and their five children, were originally from Budapest, Hungary and later immigrated to Appleton, Wisconsin (Higbee). Harry Houdini was born on March 24, 1874 (â€Å"Harry 2†). Harry Houdini’s father, a rabbi named Mayer Samuel, did not necessarily agree with his son’s interest in magic, but when Harry was sixteen, his father passed away, and he felt free to pursue his passion as a career. Harry’s brother, Theodore Hardeen, born Ferencz Deszo Weiss, helped him to kick-start his career by becoming his magic assistant.The duo became known as the â€Å"Houdini Brothers† (Higbee). Houdini later met Wilhelmina Beatrice â€Å"Bess† Rahner, and two weeks later, he made her his wife. Bess was also in the entertainment business as a struggling singer, so she decided to help her husband with his magic career. Although she replaced Theodore, Bess made a great magic assistant because she could sing, dance, and she was light weight (â€Å"Harry 1†). To most, magic is just a hobby, but instead, Harry Houdini decided to pursue his passion and was very ambitious to become the best in his craft. Houdini’s first exposure to magic was when his father took him to see Dr.Lynn, a touring magician, who used butcher knives to cut off the limbs and head of a victim in a cabinet. Harry Houdini was thereafter infatuated with magic. â€Å"At the age of 12, Houdini ran away from home to find a job and help support his family. When he returned, he greeted his mother with, â€Å"Shake me, I’m magic. † As his mother shook him, coins flew from his body; this was Houdini’s first magic trick. † The young, aspiring magician educated himself primarily with books. Revelations of Spirit Medium by A. Medium exposed the tricks of fake psychics, and The Memoirs of Robert-Houdin was the autobiography of Houdini’s mentor and inspiration. At the age of seventeen, Erich Weiss changed his name to Harry Houdini after Harry Kellar, American magician, and Jean Eugene Robert-Houdin, from whom Houdini took his surname and added the letter ‘i’. Houdini had written, â€Å"From the moment I began to study the art, he became my guide and hero. I asked nothing more of life than to become in my profession like Robert-Houdin† (â€Å"Harry 1†). Harry Houdini’s thirty-five year magic career was very successful and his well-known, outrageous stunts made him the legendary magician we know him as today.One of Houdini’s first performances got him the name the â€Å"King of Cards. † He was obviously a talented magician but he performed simple tricks that got mediocre reviews (â€Å"Harry 1†). For about seven years, Houdini worked small shows and labored in obscurity. He was on the brink of reevaluating his career when he was given his big break on vaudeville by theater master, Martin Beck. Beck became Houdini’s manager and helped the young magician get nationwide notoriety. This was a huge leap from the twenty-five dollar a week Harry had been previously making. This was a huge turning point for his career (â€Å"Harry 4†). Harry joined the Society of American Magicians (S. A. M. ) in 1904, an organization established in 1902 by professional and amateur conjurers who shared a common interest in publicizing mystery attractions and sharing their tricks at monthly meetings. † Houdini resigned two weeks later because of disagreements regarding his magazine. Harry Houdini and S. A. M. eventually reconciled their differences and Harry not only rejoined the group, but was readmitted as an honorary member in 1912 and was later even elected president, which was a huge honor to Houdini (â€Å"Harry 1†).He sailed to England in the summer of 1900 where he began his first internati onal tour. Upon returning to the United States in 1905, he was feeling pressure to become bigger and better. Houdini toured for the next ten years, constantly finding ways to stay in the public eye and push his abilities to their limits (â€Å"Harry 4†). But Harry was smart. He knew that his vaudeville tours would not last forever so he started finding alternative ways to further his career. He began appearing in silent films such as Master Mystery and Grime Game.This also sparked his idea to found the Houdini Picture Corporation in 1921. The production company debuted its first film the Man From Beyond (â€Å"Harry 5†). Another venture that Harry Houdini was particularly proud of was the Conjurer’s Monthly Magazine (â€Å"Harry 3†). Harry Houdini is known for his death-defying stunts and escapes and his ability to entertain and shock his audience which is why he is considered to be one of the forefathers of magic and illusions. Houdini had two fundamenta l types of tricks: illusions and escapes.For example, early on in his career, Harry realized that most handcuffs open with the same key. He then took this premise and began to encourage the members of his audience to bring their own handcuffs to lock him into for a sense of believability. This became known as his â€Å"Challenge Handcuff Act†. But later on in his career, his escapes became more and more outrageous. On January 7, 1906, Harry Houdini established himself as a professional magician by escaping from the jail cell of President Garfield’s assassin, Charles Guiteau, in Washington DC.Houdini was stripped down, searched, and locked up in the cell. Not only did he escape from the cell, he also retrieved his clothes that were locked in a different cell, redressed, and switched eight other prisoners to different cells, all in 21 minutes. This stunt was coined, the â€Å"Naked Prison Test Escape†. Harry Houdini then decided to take his escape skills to the ne xt level by challenging himself to get out of a straitjacket. Sure enough, the master escape artist was able to do it, but how? There are theories that Harry had to dislocate his shoulder in order to get slack.Or perhaps another, and more likely theory, is that Harry expanded his chest and strained against the body straps. While those are just examples of Houdini’s most famous escapes, he is also known for being an illusionist as well. One of Harry’s most famous illusions was the â€Å"Vanishing Elephant† which became such a hit, that Houdini continued to perform it on his tour for nineteen weeks. It first debuted on January 7, 1918 when Houdini’s 10,000 pound elephant, Jenni, walked into an empty cabinet with a door on the back and a curtain in front. Two seconds later, Jenni had disappeared. Needless to say, Houdini left the audience dumbfounded.Unfortunately, however, during Houdini’s tour on October 22, 1926, students from McGill University ask ed if Houdini could withstand a blow to the stomach. Before Harry had any time to brace himself for the hit, J. Gordon punched the famous magician three times causing his appendix to rupture. Harry survived but not for much longer. A few weeks later he fell ill from streptococcus peritonitis (an inflammation of the abdominal cavity) and died on October 31, 1926. Harry Houdini’s mysterious illusions and risky escapes caught the attention of people all over the world, and he continued to entertain them for the early part of the 1920s.As the forefather of magic, Harry Houdini set the stage for future, aspiring magicians to try to go above and beyond his already extreme tricks. There have been comparable stunts from magicians, such as Chris Angel and David Blane more recently, but Harry was the first to make the impossible possible. For that he will forever be known as the greatest magician of not only the 1920s, but the greatest magician of all time. Works Cited â€Å"Harry 1 H oudini. † American Decades. Ed. Judith S. Baughman, et al. Detroit: Gale, 1998. Biography In Context. Web. 21 Feb. 2013. â€Å"Harry 2 Houdini. Encyclopedia of Occultism and Parapsychology. Detroit: Gale, 2001. Biography In Context. Web. 21 Feb. 2013. â€Å"Harry 3 Houdini's Magic. † American Decades Primary Sources. Ed. Cynthia Rose. Vol. 1: 1900-1909. Detroit: Gale, 2004. 33-37. Biography In Context. Web. 21 Feb. 2013. â€Å"Harry 4 Houdini. † St. James Encyclopedia of Popular Culture. Ed. Sara Pendergast and Tom Pendergast. Detroit: St. James Press, 2000. Biography In Context. Web. 21 Feb. 2013. Higbee, Joan F. â€Å"Houdini: A Biographical Chronology. † Houdini: A Biographical Chronology. Oct. 1996: n. p. SIRS Government Reporter. Web. 22 Feb 2013.

The American Dream Of Homeownership - 956 Words

In the post years of the real estate crises, we saw slow but careful recovery progress. The homebuyers and sellers in the new market who either lived through the crises or watched the aftermath of the effects, learned valuable lessons and approaches to buying real estate. The years preceding the market melt down, homeownerships were painted as an American dream in a hyped fashion instead of a responsible investment. The demand for homeownership and immediate profit drove up prices in an unhealthy rate, and fueled a competition among buyers to use real estate as a vehicle to make quick money. That silently destroyed the American dream of homeownership. The competition spread to financial institutions to creatively fit unqualified borrowers into homes and finance over leveraged investors. The biggest debt an individual ever taken on their life time came with the least amount of information, if any. The entire real estate became a pure transaction number, from how much will the buyer able to sell the home they have yet to purchase to how much can real estate professionals make on the deal, to how quickly it can be closed. We saw an enormous amount of buyers not knowing what type of loan programs they just obtained and how it’ll play out throu gh the life of the loan. We heard buyers fascinated in how easy it is to obtain a mortgage loan and the expectation that no one should be denied. The other interesting component is the lack of qualified professional involved in theShow MoreRelatedThe American Dream Of Homeownership1031 Words   |  5 Pagesattorneys wrote to protect them. The American public only heard that their home was the largest investment and had never experienced, nor had their parents seen the value of their personal homes drop like they did in the past few years. 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Dr. Martin Luther King Jr. declared he had â€Å"a dream† that one day freedom, justice andRead MoreThe American Dream859 Words   |  4 PagesThe concept of the ‘American Dream’ has changed dramatically over the past couple decades. Originally, the idea l American Dream consisted of marriage, children, a stable job with a high enough income to save and invest, and buying a house for the family. Subsequent of the Great Recession, buying a house is not as desirable or even feasible for the millennial generation. Millennials are interested in a different American Dream, focused on receiving an education and making enough money to pay the billsRead MoreForeclosure Crisis: A Time for Change1105 Words   |  5 Pageseconomic policies; the housing market was fed by the politicians instilling the thought that every person should be a homeowner. 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