Biography of Amedeo Avogadro, Italian Scientist

Biography of Amedeo Avogadro, Italian Scientist Amedeo Avogadro (August 9, 1776–July 9, 1856) was an Italian scientist known for his research on gas volume, pressure, and temperature. He formulated the gas law known as Avogadros law, which states that all gases, at the same temperature and pressure, have the same number of molecules per volume. Today, Avogadro is considered an important early figure in atomic theory. Fast Facts: Amedeo Avogadro Known For: Formulating the experimental gas law known as Avogadros lawBorn: August 9, 1776 in Turin, ItalyDied: July 9, 1956 in Turin, ItalyPublished Works: Essai dune manià ¨re de dà ©terminer les masses relatives des molà ©cules à ©là ©mentaires des corps, et les proportions selon lesquelles elles entrent dans ces combinaisons  (Essay on Determining the Relative Masses of the Elementary Molecules of Bodies and the Proportions by Which They Enter These Combinations)Spouse: Felicita Mazzà ©Children: Six Early Life Lorenzo Romano Amedeo Carlo Avogadro was born into a family of distinguished Italian lawyers in 1776. Following in his familys footsteps, he studied ecclesiastical law and began to practice on his own before eventually turning his attention to the natural sciences. In 1800, Avogadro began private studies in physics and mathematics. His very first experiments were conducted with his brother on the subject of electricity. Career In 1809, Avogadro started teaching the natural sciences in a liceo (high school) in Vericelli. It was in Vericelli, while experimenting with gas densities, that Avogadro noticed something surprising: the combination of two volumes of hydrogen gas with one volume of oxygen gas produced two volumes of water vapor. Given the understanding of gas densities at the time, Avogadro had expected the reaction to produce only one volume of water vapor. That the experiment produced two lead him to surmise that oxygen particles consisted of two atoms (he actually used the word molecule). In his writings, Avogadro referred to three different types of molecules: integral molecules (most similar to what scientists call molecules today), constituent molecules (those that are part of an element), and elementary molecules (similar to what scientists now call atoms). His study of such elementary particles was highly influential in the field of atomic theory. Avogadro was not alone in his study of gases and molecules. Two other scientists- English chemist John Dalton and French chemist Joseph Gay-Lussac- were also exploring these topics around the same time, and their work had a strong influence on him. Dalton is best remembered for articulating the basics of atomic theory- that all matter is composed of tiny, indivisible particles called atoms. Gay-Lussac is best remembered for his eponymous gas pressure-temperature law. Avogadro wrote a memoria (concise note) in which he described the experimental gas law that now bears his name. He sent this memoria to De Lamà ©theries Journal de Physique, de Chemie et dHistoire naturelle, and it was published in the July 14, 1811 issue. Though his discovery is now considered a foundational aspect of chemistry, it did not receive much notice in his time. Some historians believe that Avogadros work was overlooked because the scientist worked in relative obscurity. Although Avogadro was aware of his contemporaries discoveries, he did not move in their social circles and he did not begin corresponding with other major scientists until late in his career. Very few of Avogadros papers were translated into English and German during his lifetime. Additionally, his ideas were likely neglected because they contradicted those of more famous scientists. In 1814, Avogadro published a memoria about gas densities, and in 1820 he became the first chair of mathematical physics at the University of Turin. As a member of a government commission on weights and measures, he helped introduce the metric system to the Piedmont region of Italy. The standardization of measurements made it easier for scientists in different regions to understand, compare, and evaluate each others work. Avogadro also served as a member of the Royal Superior Council on Public Instruction. Personal Life Not much is known about Avogadros private life. In 1815, he married Felicita Mazzà ©; the couple had six children. Some historical accounts indicate that Avogadro sponsored and aided a group of people planning a revolution on the island of Sardinia, which was ultimately stopped by the concession of Charles Alberts modern Constitution (Statuto Albertino). Because of his alleged political actions, Avogadro was removed as a  professor at the University of Turin. However, doubts remain as to the nature of Avogadros association with the Sardinians. In any case, increasing acceptance of both revolutionary ideas and Avogadros work led to his reinstatement at the University of Turin in 1833. Death In 1850, Avogadro retired from the University of Turin at the age of 74. He died on July 9, 1856. Legacy Avogadro is best known today for his eponymous gas law, which states that equal volumes of gasses, at the same temperature and pressure, contain the same number of molecules. Avogadros hypothesis wasnt generally accepted until 1858 (two years after Avogadros death)  when the Italian chemist Stanislao Cannizzaro was able to explain why there were some organic chemical exceptions to Avogadros hypothesis. Cannizzaro helped clarify some of Avogadros ideas, including his view of the relationship between atoms and molecules. He also provided empirical evidence by calculating the molecular (atomic) weights of various substances. One of the most important contributions of Avogadros work was his resolution of the confusion surrounding atoms and molecules (although he didnt use the term atom). Avogadro believed that particles could be composed of molecules and that molecules could be composed of still simpler units (which we now call atoms). The number of molecules in a mole (one gram molecular weight) was termed Avogadros number (sometimes called Avogadros constant) in honor of Avogadros theories. Avogadros number has been experimentally determined to be 6.023x1023 molecules per gram-mole. Sources Datta, N. C.  The Story of Chemistry. Universities Press, 2005.Morselli, Mario.  Amedeo Avogadro: a Scientific Biography. Reidel, 1984.

Asset Classes Essay Example | Topics and Well Written Essays - 750 words

Asset Classes - Essay Example One of the major asset classes of OXT is stock. For the last 52 weeks, the company has recorded a daily average of 1.2 K shares in the UK market. Even though the company has displayed a downward trend on the 50 day moving average, the 20 day moving average depicts a financial strength of the company. One of the major concerns of the company management is the 200 SMA that stands at 18.47, thus creating a lot of resistance from the investors. According to the performance of Coca-Cola on the 9th of August, 2012, the company shares closed at 79.24 USD, indicating a decrease of 0.4%. On August 9, 2012, 4.79 million shares were traded, which indicates an increment of 23.89% as compared to 2011. As compared to OXT, which shows a downward movement of its stock prices, Coca-Cola stock prices depict a significant increment. Money market is an additional asset class of OXT. Currently, the company market capitalization stands at 1 while shares in issue are 5.43 million. The company profit margin is 500% while turnover per share stands at 0.001 (Oxford Technology Venture Capital Trust: Fundamentals, 2012). On the other hand, Coca-Cola market capitalization stands at 178.39 billion. The company shares outstanding 2.25 billion, thus attracting many investors. Based on its high profitability and large investment portfolio, Coca-Cola’s earning per share (EPS) stands at 3.78 USD. According to the financial report provided by the company in the month of July 2012, an average of 6.16 million shares has been sold. Asset classification of Oxford Technology Venture Capital Trust PLC and other similar mutual funds is significant in that it helps the investors to determine the type of investment that fits their needs. It is important to note that due to the recent economic downturn, the current investment environment has been faced with challenges based on low level of employment, which was experienced in many

Philosophy - Kant Treatment of animals, Utilitarianism Vegetarianism Essay

Philosophy - Kant Treatment of animals, Utilitarianism Vegetarianism - Essay Example For instance, Immanuel Kant is opposed and condemned on the basis of his notion that only humans serve as the object of honor. The critics argue that Kant does not present anything in favor of displaying kindness towards animals, nor does he condemns exercising butcheries on the creature that is unable to speak or deliver a single word even. Kant does not give animals the status equal to man but is of the view that since the animals are unable to describe their pains and sufferings, they should be treated with kindness in the same manner as it is displayed towards the person. Hence, if Kantian philosophy is considered in its true prospect, it becomes crystal clear that the renowned philosopher lays stress upon the same moral values adopted by an overwhelming majority of the individuals belonging to various cultures and societies of the world. Moral values maintain the direct relationship with religious beliefs, social norms, and cultural values. All existing religions and culture preach kindness towards animals, and the same is emphasized upon by the philosophers. Neither religion, nor society allows harsh treatment of animals, but the life of the animals cannot be stated as honorable, precious and prestigious and that of the persons (i.e. humans) In his work under the title the Metaphysic of Morals, Kant declares that man is bound to pay his duties and obligations to himself and his fellow beings i.e. persons and nature of duties towards animals is surely different from those which are towards human beings.

Football essay Essay Example for Free

Football essay Essay It’s easy to see that Football is the most fun sport ever invented. To be a promising football player you have to poses physical, mental talent. Above all the qualifications of becoming a football player, I think respect on the field is a necessity. Respecting players and plays will most certainly bring you closer to a career as a football player. The game of football has been proven to be more of a mental than physical but physical abilities are also important. It’s good to work out for physical ability, but a rest is essential to achieve the goal. Each football team has an offense and defense. The referee calls all the decisions on the field. Recently, a player was tackled by the neck, so the referee called unnecessary roughness penalty. It’s good to be physical but referees are trained to watch out for the safety of players. I played football as a wide receiver at Burlington High School. I loved every second I was on the field playing offense. Of all the receivers that have ever played in the National Football League, Randy Moss is my favorite. In his prime time, he made amazing catches to give his team a chance to win the game. Thinking who far he had come, Randy Moss made every moment count. Running down the sidelines of the defense, he was able to out run any defender trying to tackle him. Holding the ball in his hands, he was fierce as teams needed more than one defender to tackle him. To me Randy Moss is more than a player, he is a mentor and inspirational to all the football fans. To accomplish the success that he had, he had to put in extra practice work and mental awareness of the opponent. I always wanted to be like him and able to play football like him. Football is that kind of a sport where by the harder you practice, the better you get. Now that he has retired, Calvin Johnson is the only other active receiver that I can compare him to. Before the super bowl each year, fans all over the nation gather around and get ready for the game. It is the most watched championship game each year in all sports. Because the game is viewed by millions of people, companies get the opportunity to advertise their products to people. Just as companies want to advertise their products, they are also required to show off their creativity in the commercials. Each super bowl game, there is a commercial that wins peoples favorite vote for most creativity. In High School the coach always told the players if you forget what you supposed to do on the field; I will be glad explain. Football is a team sport; the success of the team is determined by how much work each member puts in. I will want some day help build football fields for kids to play; that is a promise I make.

High Heels Essay -- Fashion Shoes Papers

High Heels "To be carried by shoes, winged by them. To wear dreams on one's feet is to begin to give reality to one's dreams." -Roger Vivier Shoes of every make and style are loved by women across the globe but it is the heel, whether stiletto or platform that is coveted, adored, desired in such abundance simply in and of the shoe itself. They're everywhere. They run rampant in books, calendars, photographs, album and movie covers, dangling in miniature precious metal versions from earlobes and chains, women's closets and even their living rooms, and let's not forget their most important place of residence- women's feet. They're a constant obsession in pop culture, endlessly talked about and fetishized in television, movies, song lyrics, and seem to be worn without fail by glamorous celebrities no matter the occasion. The most notorious of the shoe loving pop culture media is of the smash HBO series Sex and the City, in which shoes are one of its main themes. Cast of Sex and the City at http://www.spiegel.de/kultur/gesellschaft/0,1518,grossbild-233666-286899,00.html What's in a shoe? Perhaps it was originally intended to protect one's feet from the elements but today the shoe has evolved from its practical origins to grandiose heights, and at the highest level is of course, the high heel. Heels are not something one simply wears on their feet, but a passion, hobby, personal expression, source of authority, sexual independence, staple of gendered feminine culture, mark of flaunted femininity, psychologically empowering, and joy. Women choose to wear high heels for many reasons; the key is that they indeed are the ones who proactively choose to endorse the high heel, often at the expense of their own physical com... ...t the decision to wear high heels is one way to rebel within a system. Women who wear these tall heel it because they like to, for their own pleasure. Whether they like the erotic connotations, excitement, height, delicate structures, dangerous points, phallic penetrative qualities, royal history, haughty independence, aesthetic beauty or a confusing combination of all of that and more, women who love high heels do so of their own volition and desire. Manolo Blahnik, the "high priest of high heels" (Benstock & Ferriss) sums up the patronizing idea that women should be pitied for their chose and love of high heels. He was once asked if he, "ever felt sorry for all those women teetering through their lives on the spikiest of high-heeled shoes," to which he responded, "Oh, my God, how could I feel sorry for them? Sorry. Sorry for who? They love it." (Specter, 388)

Nucleophilic Substitution

Experimental: Theoretical: Discussion [6] The experimental findings obtained are largely consistent with theory. The activation energy obtained in Part C, 138. 6 k/mol is not too far below the theoretical activation energy of 148. 526 k/mol[6], while Part A confirms the theory that k is dependent on he initial concentration of reactants, since it is a first order reaction. This is clearly depicted in Figure 3, where the alteration of the amount of t-butyl chloride being added to the reaction vessel clearly produced a different rate constant.The findings from Part B of the experiment proved that the reaction followed the SIN mechanism, reaction rate to increase due to the usage of polar solvents to stabilize the carbonation being produced during this mechanism in the slow, rate-determining step [5]. However, there were errors in the experiment, which led to the results being lightly off from theory, such as the lower than expected value for the activation energy. One major source of e rror was the fact that t-butyl chloride reacts with water. Since there is water present in the air, this actually reduces the concentration of the t-butyl chloride solution.If a sample was left exposed for longer, more would react, lowering the concentration further. The following equation shows the reaction with water:[3] + H2O 0 + HCI Another source of error would be the hydrophilic of acetone. This means that acetone, being polar, is attracted to water, another polar compound. As a result of this, the acetone has water molecules clumped around it in the acetone/water mixture, which inhibits the reaction slightly, as the t-butyl chloride molecules, being bulkier, find it harder to access the acetone.While the reaction was ongoing, it was noticed that there was usually a temperature rise that accompanied it. This is another source of error, since the increase in temperature would contribute to an increased rate, which would in turn show up on the measurements taken due to the incre ase in conductivity of the mixture in the reaction vessel. Lastly, the room imperative experiment (run 7 from the Procedure section) did not have a water bath, making it a biased trial.If the experiment were to be repeated, there should be a room temperature water bath for that particular run, to make the experiments uniform and fair. Conclusion The introduction to the experiment stated that the kinetics of the necrophilia substitution reaction were to be studied and found to be affected by changes in concentration of t-butyl chloride, the percentage composition of the acetone/water solution (solvent polarity) and the temperature at which the reaction was to be aired out.The results from this experiment were successful in proving that changes to these three conditions varied the rate constant (k), thus they affected the kinetics of the reaction. Upon research it was found that econometric analysis could also be carried out on other reactions such as the hydrolysis of urea (which is highly important for plants to be able to absorb nitrogen from urea)[7], and to study iterations of acids and bases, where the conductivity starts to fall as a base is added to an acid, until it reaches a minimum at the naturalization point, before rising again hen more base or acid is added [8].For the hydrolysis of urea, it initially reacts with water to produce ammonia gas, ceramic acid, water and carbon dioxide. For the plants to obtain the nutrients, the water must react with the ammonia to produce ammonium ions that can be absorbed. NH + H2O 0 NH+ + OH- The rate of production of the ammonium ion can be studied using contemporary, allowing us to deduce the rate at which plants are obtaining nutrients from the urea, and to note how much ammonia is escaping as gas as opposed to being converted to an ion.

Analysis Of The Knight And His Tale - 2835 Words

An Analysis of the Knight and His Tale in The Canterbury Tales The Canterbury Tales, a poem consisting of several tales told by various pilgrims, is perhaps the most well known work of Geoffrey Chaucer. The Canterbury Tales Chaucer introduces the pilgrims in the general prologue many of the pilgrims in a satirical manner. In prologue to The Canterbury Tales, Geoffrey Chaucer introduces the Knight as â€Å"a true perfect gentle-knight,† (5) who exemplifies the code of chivalry. The tale that the Knight later narrates is appropriate because it tells of two knights fighting for the hand of the same maiden while remaining chivalrous. The image of a knight was not always romantic nor was it noble. It was not until after the Norman Conquest that the term â€Å"knight† began to signify nobility. As the image a knight shifted to represent an elite member of society, The Catholic Church developed a chivalric code in order to govern the behavior of knights. (Rogers 263-264). According to chivalric code, knights were bound to defend society, treat women with honor and respect, remain faithful to God, and exemplify courtly love, the desire or a need to serve a noble woman (Rogers 100). However, while most knights attempted to follow the chivalric code very few of them were able to become perfect knights (Corrick 35). The concepts of chivalry and a perfect knight are prominent in Chaucer’s description of the knight in the general prologue (Rogers100-101). Becoming a night worthy of such aShow MoreRelatedSir Gawain and the Green Knight, and One Thousand and One Nights1097 Words   |  4 PagesGreen Knight† and â€Å"One Thousand and One Night† both are marvelous works. The similarities between these Arabian tales and Sir Gawain and the Green night are very striking. The scholar Edward L. Risden in his analysis of â€Å"One Thousand and One Nights,† mentioned â€Å"Sir Gawain and Green Knight† and some of the main subjects of both of these tales. 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