The rate of rReaction Essay Example for Free

The rate of rReaction Essay These results also support my prediction and I believe that the collision theory is quite accurate even though it is only a theory as it gives a very good explanation of what should happen and it has happened in my experiment. I am going to include 0. 25M in my main experiment as I believe that this will give a better range of results and also increase the accuracy of my results. I will keep the amount of time the same as I believe it was the best amount of time to get an accurate reading. I will do my main experiment results to one decimal place as I believe that this will give me the most precise results. When reading the amount of gas in the cylinder I will take any number that is whole e. g. 14 to be 14. 0. To improve my reliability I will repeat each concentration three times as I believe this will give me a reliable average. Results Table Results To Show How Much Gas Is Given Off In 5 Minutes Volume of Gas Collected (cm ) Time in minutes Test Concentration Test Any number highlighted are not counted in the average as I believe that the are either to high, to low or do not fit into the pattern. Result that I believe is causing the results for this time to be inaccurate. ( see level of confidence) I will not include this result in my new average. I have found out that 2M is the best strength of hydrochloric acid to use when you want a fast reaction, as it released the most gas in 5 minutes compared to 0.5M, 1M and 1. 5M. I can make the statement the stronger/higher molar(M) the acid the faster the reaction and the weaker/lower molar(M) the acid the slower the reaction. Conclusion I conclude 2M is the best concentration of acid. You can see this on my graph, my graph shows that 2M is the best concentration of acid out of all the ones that I tested as it had the quickest reaction time compared to all of the other concentrations. You can see this from the graph as 2M has got the steepest slope. I believe that the activation energy (see background information for detailed explanation) has effected my results. I believe that the concentration of the acid makes it easier for the particles to react. But what does this have to do with the activation energy? Each molecule has a certain amount of energy and for the molecule to react it must collide with another molecule. It must also generate more energy that it already has. In a low concentrated solution, there are less molecules so it hard for a molecule to find other molecules to collide with, but in a high concentrated solution collisions are more frequent and even if the molecule does not collide with enough energy to react it will soon hit another molecule and have a high possibility of reacting. I predicted that the 2. 0 molar acid would have the quickest reaction time and the 0. 25 molar would have the slowest reaction time I also said that the other concentrations would go in order of their concentrations, the higher the concentration the more gas there will be released and the lower the concentration the less gas there will be released. I believe my predictions were accurate as I based them on the collision theory and even though it is a theory I believe it is an accurate theory and explains what is believed to happen when reactions take place very well. 0. 5M and 1M start off wrong in my opinion as until 3 minutes 0. 5M had released more gas where as I believe according to the collision theory 1M should have released more gas and reacted faster, but in the end 1M released more gas. This also happened in the first 30 seconds of the 0. 25M where it also released more gas than the 1M. This leads me to believe that the 1M may have been the wrong concentration. It is because of this reason I am going to work out the confidence levels for my results. I will take 0 as 100% accurate and 100 as 0% accurate. Level Of Confidence I am going to work out the inaccuracy of my results I will do this by doing the sum Range multiplied by 100= level of inaccuracy Average I have chosen to do the inaccuracy of time   as I believe that I can get a good reading of how inaccurate my results are by doing a selected number of times. Time Concentration Range of gas Average Amount of Times Equals (minutes) of acid(M) released(cm ) gas released(cm ). I am going to look at   my results table and 1 Level of confidence for sum that I believed was inaccurate I have now changed the range of the gas released at 4. 5 minutes.   This inaccuracy level is a lot lower than the other one. This means that that volume of gas released was to low, many things could have caused this . e. g. the temperature of the room could have been lower than when I did the other two experiments. Evaluation I believe my results are quite accurate and would be considered reliable as non of my results have a high inaccuracy level or have a 50% chance of being wrong. I have highlighted the results that I believe are wrong on my results table and have not included them in my averages. On my graph my points go up in curves or in some sort of curve. I have joined all of the point on my graph together but on some of my curves I have done a curve of best fit, I have done this because it will show me if any results are slightly wrong. If you look at the green curve for 0. 5M you will see that the points at 2 and 2. 5 minutes look slightly to high, the curve of best fit shows where the points should have been. The trend I see from the graph is that the higher the concentration of the hydrochloric acid the steeper the slop of the graph is. I believe that the way in which I carried out my experiment was good as I followed my method exactly. To improve the accuracy of my method I could have said I would use a bulb pipette or a graduate pipette as these are more accurate than a measuring cylinder, I could make sure that the marble chips all have the same surface area because the marble chips with the bigger surface areas could have reacted more than the marble chips with the smaller surface areas. I could have also make sure that the room was the same temperature for each experiment because if the room was hot for one experiment and cold for another then the results would be inaccurate as the molecules would have been moving and reacting at different speeds. The results I have support my conclusion and my prediction, as what I predicted would happen did happen. The order of the concentrations for the most gas released in 5 minutes was also accurate, as it was in the order that I predicted. To extend my investigation I could test if the temperature had any effect on the amount of gas released, I believe this would provide me with the relevant information about what the optimum temperature is for a reaction to take place. I could then test the optimum concentration and the optimum temperature together and see how much gas is released in 5 minutes and compare it to the separate results of the concentration and temperature. Show preview only The above preview is unformatted text This student written piece of work is one of many that can be found in our GCSE Patterns of Behaviour section.

By Design Essay -- Literary Analysis, Robert Frost

Redesigned: One poem with two faces Robert Frost wrote a poem – twice. The early version of the poem titled, â€Å"In White,† creates a simple scene filled with anomalies. For some reason, years later, the work beckoned for further attention. The poet complied and skillfully enhanced the work, rendering a finished poem that exceeded the scope of the original. Side by side, both versions of Frost’s poem send a nuanced message to the thoughtful reader. Open to interpretation, that message invites debate, an introspective feast. For that reason, reworking the poem fine-tuned the message. The revised poem â€Å"Design† assumes polished superiority through Frost’s mastery of imagery, amplified by devices, and unburdened language. For the purpose of clarity, explicating provides an understanding of the internal workings of this finished poem. A closer look at one poem helps to identify the differences between the two. Frost’s poem, â€Å"Design† begins in a most uncomplicated way: â€Å"I found a dimpled spider, fat and white† (1). The spider, described as such, denotes jolly innocence, an unlikely association. Introducing the first of several ironies, the heal-all, which preserves life, has a growing connection to death. In fact, the flower provides a stage for the spider, menacing in spite of its pale disguise as it sits â€Å"On a white heal-all, holding up a moth / Like a white piece of rigid satin cloth–† (2-3). Frost’s white color scheme persists into the dead moth simile. Satin, typically equated with rich finery, finds a meaning much less elegant with the adjective, rigid. Each line zooms closer to the scene at hand, no doubt something is just not righ t. The mood continues with, â€Å"Assorted characters of death and blight† (4), and ad... ..., aided by Frost’s selection of devices, such as similes. As such, the reader derives a deeper understanding of the action, like the lifting of a veil. In summary, explicating â€Å"Design† served to process both poems. Such a exercise provided a clearer perspective of Frost’s initial rendering and subsequent finished work. Thus, exposing subtle differences resulted in a way to compare the work and draw a subjective conclusion regarding the more effective poem. However, one must remain mindful that without the lesser first â€Å"draft,† the second would have had no life. Indeed, Frost refined with a delicate hand by shaping images, placed inventive markers to prod thought, and carefully gave voice to each word. The result produced a superior message, which posed more questions than solid answers about whether life (or death) happens by coincidence, or by â€Å"Design.†

Music History Medieval -> Baroque Notes

Music History 1st year midterm notes Chapter V: The Middle Ages and the Evolution of Polyphony Early Middle Ages (5th-10th century) High Middle Ages (1 lath-13th century) Late Middle Ages (14th-1 5th century) Composers: Hildebrand of Binge (1098-1179) Songs composed Plainchant Sequence: Combat Aspect About: -German writer, composer, philosopher, Christian, and visionary -had visions and later recognized as a gift from god. -was sent to the church in god's service, due to her visions or political position. -elected magistrate in her community in 1136 -wrote 69 musical compositions music composed is very monophonic.Banter De Vendor (1130? – 1200?) Court Music: La Dough Vote -a troubadour and secular composer -his composition/writing style helped establish the classical form of courtly love poetry -is French -approximately 45 of his composition and works survived. Pertain/Pertain the Great (End of 12th Century – Beginning of 13th Century) Organza Music: Alleluia: Diffuse e st. gratin -European Composer (believed to be French) -pioneered the style of organza triplet/quadrupled (3/4 part harmonies) -his works are preserved in the â€Å"Magnums Libber† Gallinule De Mach Nova)Songs Composed Polyphonic Progression: Dame, De quiz touted ma Joke event Quant en mom -Medieval French poet and composer -part of the musical movement known as Ears Nova -helped developed the motet and secular song forms -survived the black death/plague -composed 400 poems, 235 ballades, 76 rounded, 39 varietals, 24 alas, 10 complaint's and 7 chansons royals. -majority of his poems reflect on the conventions of courtly love. Chapter VI: The Renaissance Began in Italy after late middle ages and spread to the rest of Europe Cultural movement that spanned from 14th-17th centuryThe printing press was developed which helped spread this movement. Gallinule Duffy (1397-1474) New Attitudes: Eve Maria Stella -Netherlands composer of the early renaissance -most famous and influential c omposer in Europe in the 1 5th century -printing press allowed for his works to spread rapidly -wrote 7 complete masses, 28 individual mass movements, 15 chants, 3 magnificent, 15 antiphons, 27 hymns, 22 motets, and 87 chansons.Joaquin des Perez High Renaissance Style: Panged lingua Mass, Keri Panged lingua Mass, from the Gloria Music As Expression : Mille Regrets Netherlands composer of high renaissance -wrote both sacred and secular music -wrote 18 masses, 100 motets, 70 chansons -traveled a lot -a humanist composer, uses word painting Giovanni Pepperoni dad Palestinian (1525-1594) Late Renaissance Style: Pope Marcella Mass -Italian Renaissance Composer -Incidentally enough, was born in a town called Palestinian -under the influence of the European style of polyphony -choir master and composer -wrote 105 masses, 68 offertories, 140 madrigals, 300 motets Thomas weeks (1576-1623) Secular Music Style of Renaissance: As Vests was from Lattes Hill English Composer -Became organist of W inchester College and Chester Cathedral 1 598 -wrote many many madrigals -works consisted heavily on vocal compositions -most anthems written are verse anthems Chapter VI': The Early Baroque Period From 1600-1680 Period of artistic style and development of exaggerations and motions Encouraged by the roman catholic church Giovanni Gabriele (1554-1612) Renaissance to Baroque Progression: O magnum mysteries -Italian composer and organist -Influential musician in the shift of Renaissance to Baroque -born in Venice -became organist of SST. Marks Basilica in 1585Later Medieval Polyphony Anonymous: Round: Summer is legmen In CD 1:5 -repeating motifs everywhere -Early medieval English round or paragons (I. E. Row row Row your boat) Mach: Dame, De quiz touted ma Joke event CD 1:6 Mach: Quant en mom -French -Motet -lots of dissonance -floats melody Chapter VI: The Renaissance Ears Nova: 14th century -age of exploration -age of humanism -focus of human life and accomplishment, of appreciation in the beauty of a life – secular movement develops New Attitudes Duffy: Eve Mans Stella CD -very arrogantly decorated -floats modal melody -in Gregorian style -Latin The High Renaissance Style – blend of homophony, and imitative counterpoint. – has rich harmonic textures – usually in chapel onlyJoaquin: Panged lingua Mass, Keri CD 1:8 -very implicates -repeating motifs in other voice parts -ends palpably Joaquin: Panged lingua Mass, from the Gloria CD 1:9 -repeating motifs in other parts in specific order -pneumatic Music as Expression Joaquin: Mille Regrets CD 1:10 -very intimate and sad -unresolved ending -word painting used heavily -motifs taking turns in other parts Late Renaissance Music Palestinian: Pope Marcella Mass CD 1 -solid chord structures -every part is equally as important The Motet Secular music of the Renaissance Wilkes: As Vests was from Lattes Hill CD 1:12 -English -very secular heavily polyphonic, pneumatic -word painting heavily emph asized -danceable Instrumental Music: Early Developments Anon: Gaillardia Daphne CD 1:13 -triple time -dance rhythms Anon: Kemps Gig CD 1:14 -fast and with dance rhythms -duple time Dance Stabilization Basso Continuo: Chords that are written specifically for an instrument that fills in the harmonic textures. -allows soloists to sing more freely Castrate: Male singers who were menstruated so that they could sing soprano parts. -aristocrats of opera -very very wealthy From Renaissance to Baroque G.Gabriel': O magnum mysteries CD 1:15 -homophobic full, rich chords and structures Style Features of Early Baroque Music Opera – tells a story – all dialogue is sung Monteverdi: Coronation of Poppa CD 1:16-17 -Italian -Homophobic -has aria -dialogue in song -telling a story Purcell: Dido and Names CD 1: 18-19 -very sad -minor key going chromatically down -repeats base motif over and over again but becoming more decorative as the song progresses -Italian on 18 -English on 19 The Rise of Instrumental Music Foreseeable: Suite (Cannons, Ballet, Corrected, and piccalilli) CD 1:20-23 -very dance like -only played by instrument -sounds like an organ

Analysis Of The Sides Of Paradise By F. Scott Fitzgerald

Eric Easter Erin Brescia Literature 221 22 March 2015 Amory Learns the Ropes of Love and Money and Peace Romanticism in a young man’s life can be complicated involving love and money. Amory is caught in the midst of balancing the two. Literary realism is a movement which began in France and eventually came to America as a response to the romantic era in which characters, settings, and plots were all rather idealized and pretty in some way. Literary realism is a movement which began in France and eventually came to America as a response to the romantic era in which characters, settings, and plots were all rather idealized and pretty in some way. In â€Å"The Sides of Paradise† by F. Scott Fitzgerald, in 1913 at age seventeen, Amory enters Princeton University. In his freshman year, he lives with Kerry Holiday and Tom D’Invilliers and he begins a friendship with Alec Connage. Amory begins to write poetry and vows to make more of his abilities in his sophomore year primarily concerned with his own accomplishments. The romanticism in the story goes back and forth betw een the Amory entering the school and growing up experiences with his wealthy mother. Amory begins to fit in and the story focuses on his accomplishments. Around this time World War had began and it may have had a fair amount of effect towards Amory. World War I started on July 28, 1914, when Austria-Hungary announced war on Serbia. This apparently little clash between two nations spread quickly: soon, Germany,Show MoreRelatedThe American Dream in The Great Gatsby and This Side of Paradise1382 Words   |  6 PagesFrances Scott Fitzgerald was born on September 24th, 1896 in St. Paul Minnesota and died of a heart attack in an apartment in Hollywood on December 21st, 1940. Throughout his career, Fitzgerald wrote many works, traveled the world, and served in the United States Army. F. 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