Coffee Cup and Bomb Calorimetry

A calorimeter is a device used to measure the quantity of heat flow in a chemical reaction. Two of the most common types of calorimeters are the coffee cup calorimeter and the bomb calorimeter. Coffee Cup Calorimeter A coffee cup calorimeter is essentially a polystyrene (Styrofoam) cup with a lid. The cup is partially filled with a known volume of water and a thermometer is inserted through the lid of the cup so that its bulb is below the water surface. When a chemical reaction occurs in the coffee cup calorimeter, the heat of the reaction is absorbed by the water. The change in water temperature is used to calculate the amount of heat that has been absorbed (used to make products, so water temperature decreases) or evolved (lost to the water, so its temperature increases) in the reaction. Heat flow is calculated using the relation: q (specific heat) x m x Δt Where q is heat flow, m is mass in grams, and Δt is the change in temperature. The specific heat is the amount of heat required to raise the temperature of 1 gram of a substance 1 degree Celsius. The specific heat of water is 4.18 J/(g ·Ã‚ °C). For example, consider a chemical reaction that occurs in 200 grams of water with an initial temperature of 25.0 C. The reaction is allowed to proceed in the coffee cup calorimeter. As a result of the reaction, the temperature of the water changes to 31.0 C. The heat flow is calculated: qwater 4.18 J/(g ·Ã‚ °C) x 200 g x (31.0 C - 25.0 C) qwater 5.0 x 103 J The products of the reaction evolved 5,000 J of heat, which was lost to the water. The enthalpy change, ΔH, for the reaction is equal in magnitude but opposite in sign to the heat flow for the water: ΔHreaction -(qwater) Recall that for an exothermic reaction, ΔH 0, qwater is positive. The water absorbs heat from the reaction and an increase in temperature is seen. For an endothermic reaction, ΔH 0, qwater is negative. The water supplies heat for the reaction and a decrease in temperature is seen. Bomb Calorimeter A coffee cup calorimeter is great for measuring heat flow in a solution, but it cant be used for reactions that involve gases since they would escape from the cup. The coffee cup calorimeter cant be used for high-temperature reactions, either, because they would melt the cup. A bomb calorimeter is used to measure heat flows for gases and ​high-temperature reactions. A bomb calorimeter works in the same manner as a coffee cup calorimeter, with one big difference: In a coffee cup calorimeter, the reaction takes place in the water, while in a bomb calorimeter, the reaction takes place in a sealed metal container, which is placed in the water in an insulated container. Heat flow from the reaction crosses the walls of the sealed container to the water. The temperature difference of the water is measured, just as it was for a coffee cup calorimeter. Analysis of the heat flow is a bit more complex than it was for the coffee cup calorimeter because the heat flow into the metal parts of the calorimeter must be taken into account: qreaction - (qwater qbomb) where qwater 4.18 J/(g ·Ã‚ °C) x mwater x Δt The bomb has a fixed mass and specific heat. The mass of the bomb multiplied by its specific heat is sometimes termed the calorimeter constant, denoted by the symbol C with units of joules per degree Celsius. The calorimeter constant is determined experimentally and will vary from one calorimeter to the next. The heat flow of the bomb is: qbomb C x Δt Once the calorimeter constant is known, calculating heat flow is a simple matter. The pressure within a bomb calorimeter often changes during a reaction, so the heat flow may not be equal in magnitude to the enthalpy change.

Little Women By Louisa May Alcott - 1041 Words

In her novel Little Women, Louisa May Alcott delves into the social expectations placed on American women in the mid-nineteenth century. Alcott explores the different impacts of these expectations through the experiences of the four March sisters as they transition from childhood to adulthood. As she follows the life of the girls as they struggle to balance the new world of social elegancies with the morals ingrained in them by their mother, Alcott challenges these social expectations and highlights the dangers they present. The struggles Jo, Meg, Amy, and Beth face as they attempt to integrate into society, although all different, calls into question the strict gender roles of the time and their functionality in the real world. During the mid-nineteenth century there were strict ideologies and guidelines held for women that they were supposed to follow. These expectations were especially strict for the women in the upper and middle classes. Women of the time period were expected to be elegant, beautiful, innocent, and domestic. The standard model for an ideal woman was exemplified in the idea of the True Woman. A True Women was â€Å"a pillar of moral strength and virtue† while also being â€Å"delicate and weak† (Cruea 189) A True Women was pure and wholesome, displaying all of the desirable traits and utmost femininity. Appearances were especially important at this time because women were expected to aspire to marriage and attract a mate. Marriage was everything when it came toShow MoreRelatedLittle Women, by Louisa May Alcott800 Words   |  4 PagesLittle Women, by Louisa May Alcott, was published in 1868 and follows the lives, loves, and troubles of the four March sisters growing up duri ng the American Civil War.1 The novel is loosely based on childhood experiences Alcott shared with her own sisters, Anna, May, and Elizabeth, who provided the hearts of the novel’s main characters.2 The March sisters illustrate the difficulties of girls growing up in a world that holds certain expectations of the female sex; the story details the journeys theRead MoreLittle Women, By Louisa May Alcott866 Words   |  4 PagesLouisa May Alcott was born and raised in Massachusetts from a financially struggling family, which will soon change due to Louisa’s writing talents. Louisa was homeschooled the majority of her childhood, which sparked her writing career. 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The story begins with four young girls trying to understand the importance of not being selfish, and it follows the livesRead MoreLittle Women Or Meg By Louisa May Alcott966 Words   |  4 PagesLittle Women or Meg, Jo, Beth and Amy by Louisa May Alcott is a coming-of-age story about four girls with all different personalities and different ways of going through the world. Al cott was persuaded by a talented editor from the Roberts Brothers firm to write a story for girls, and while Alcott was hesitant because she was not the largest fan of girls; she began the task. While this piece was originally geared to satisfy younger girls, the piece goes far beyond the point of just being anotherRead MoreEssay on Little Women by Louisa May Alcott816 Words   |  4 PagesLouisa May Alcott’s Little Women is an engaging and remarkable â€Å"snapshot† of its time. 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The family is left to survive on their own because their father went to protect his country. During the years of life the March children, Margaret (Meg), Josephine

Thailand Financial Crisis free essay sample

Examines the micro and macro-economic, political and social factors that contributed to the Thai financial crisis of 1997-8. Discusses exchange rates, size and openness, inflation, wage rates, financial sector development, central bank and mobility of ca Introduction: Situation Overview On June 27, 1997, the finance ministry of Thailand, along with the Bank of Thailand, that nations central bank, announced that activities of sixteen financial and securities firms were to be suspended for thirty days, and directed the troubled firms to find merger partners. Five days later a further and dramatic step was taken: Finance Minister Tanong Bhidaya declared that the Thai central bank would no longer support the baht, the Thai currency, at its fixed exchange rate of 24.45 bahts to the dollar. The initial reaction of international financial observers was positive. On July 10, the respected Far Eastern Economic Review reported these developments under the headline Free at Last, with a subtitle reporting that Thailand floats the baht, begins financial-sector clean-up (Vatikiotis, 1997a, 70). We will write a custom essay sample on Thailand Financial Crisis or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page According to

100 Ways to Say I Love You in Italian

100 Ways to Say 'I Love You' in Italian Whether its an operatic aria, a love poem, or whispered sweet nothings, many think the phrase I love you is best said in Italian. There are many ways to express your true feelings in this ancient language. Some are simple and straightforward, others poetic and passionate. Either way, this list of 100 ways to say I love you in Italian is sure to help you find the right words. Say I Love You in Italian Ti amo: I love youTi voglio bene: I love you a lotTi voglio molto bene: I love you very muchMi piaci molto: I really like youTi adoro: I adore youTi ammiro: I admire youSei importante per me: You are important to meSei tutto per me: You are everything to meSono innamorato / innamorata di te: Im in love with youHo bisogno di te: I need youTi voglio: I love youTi desidero: I want youMi sento attratto / attratta da te: Im attracted  to youMi sono infatuato di te: Im infatuated with youHo un debole per te: Im weak for youSignifichi tutto per me: You mean everything to meMi sono affezionato / affezionata a te: Im fond of youSposami: Marry meVoglio essere sempre con te: I always want to be with youSenza di te non posso pià ¹ vivere: I cant live without youTi voglio baciare: I want to kiss youSono tuo / tua:  Im yoursSei la mia anima gemella: You’re my soul mateSenza di te non sono niente: Without you, I am nothingSei luomo / la donna dei miei sogni: Youre the man/woman of my dr eamsSei luomo / la donna della mia vita: Youre the man/woman of my life Per te farei di tutto: Id do anything for youSono pazzo / pazza di te: Im crazy about youSono abbagliato da te: Im dazzled by youSei il grande amore della mia vita: Youre the love of my lifeSenza di te la vita non ha pià ¹ senso: Without you, life has no meaningIl mio cuore à ¨ solo tuo / tua: My heart is yoursHai conquistato il mio cuore: Youve won my heartGiorno e notte sogno solo te: Day and night, I dream only of youMi hai incantato / incantata: Youve charmed/enchanted meSei il sole della mia vita: Youre the sunshine of my lifeSei tutto cià ² che voglio: Youre everything I wantTi voglio un mondo di bene: I want a world of good for youCon te voglio invecchiare: I want to grow old with youTi voglio sempre avere al mio fianco: I always want you by my sideSenza di te la vita à ¨ un inferno: Without you, life is hellDa quando ti conosco la mia vita à ¨ un paradiso: Since I met you, my life is  paradiseResta sempre con me: Stay with me alwaysMi hai stregato / stregata: Youve bew itched mePotrei guardarti tutto il giorno: I could watch you all day Solo tu mi capisci: Only you understand meSono ubriaco / ubriaca di te: Im drunk with youNei tuoi occhi cà ¨ il cielo: Heaven is in your eyesSe non ci fossi dovrei inventarti: If you werent (real), Id invent youTu sei un dono del cielo: Youre a gift from HeavenVoglio passare tutta la mia vita con te: I want to spend my entire life with youIl nostro amore à ¨ la cosa pià ¹ importante nella mia vita: Our love is the most important thing in my lifeQuando chiudo gli occhi vedo solo te: When I close my eyes. I see only youEntra nella mia vita: Come into my lifeLa tua bocca mi fa impazzire: Your mouth drives me crazyVorrei annegare nei tuoi occhi: I want to drown in your eyesTu sei la mia vita: Youre my lifeNessuno / nessuna à ¨ come te: No one is like youSei il mio tesoro: Youre my treasureArdo di amore per te: I burn with love for youTi ho chiuso nel mio cuore: Ive closed you in my heartIl mio cuore dipende da te: My heart depends on youHo preso una sbandata per te: I have a crush on youSono tutto tuo / tua: Im all yours Ti penso sempre: I always think of youMi manchi: I miss youCome sei bella: How beautiful you areVoglio vederti stasera: I want to see you tonightTu sei una stella...la mia stella: You are a star...my starCara mia, ti voglio bene: My darling, I love youMi hai fatto perdere la testa: You made me lose my mindBrucio per te: Im on fire for youTi ho regalato il mio cuore: I gave you my heartIl mio cuore batte solo per te: My heart beats only for youSei irresistibile: Youre irresistibleSei la mia Venere: Youre my VenusMi hai rubato il cuore: Youve stolen my heartSolo con te riesco ad essere felice: Only with you can I be happyMi hai conquistato / conquistata: Youve won meI miei sensi sono pieni di te: My senses are filled with youVoglio che tu sia solo mio / mia: I want you to be only mineDai un nuovo senso alla mia vita: You give new meaning to my lifeSei un gioello: Youre a jewelPer te faccio di tutto: Id do anything for youGiorno e notte penso solo a te: Day and night, I only think about you Mi accompagni ovunque io vada: Youre with me wherever I goSei la cosa pià ¹ cara che ho: Youre the dearest thing I haveSei tutto cià ² che desidero: Youre everything I wantMi fai sognare: You make me dreamEcciti i miei sensi: You excite my sensesSenza di te sono solo met: Without you, Im only halfSei il mio angelo: Youre my angelCon te dimentico il tempo: With you, I forget timeNon ho occhi che per te: I only have eyes for youSei il mio pensiero preferito: Youre my favorite thoughtSento qualcosa di forte per te: I have strong feelings for youNon voglio perderti: I dont want to lose youLa tua bellezza mi toglie il fiato: Your beauty takes my breath awayPotrei fissare i tuoi bellissimi occhi in eterno: I can gaze into your beautiful eyes foreverPer favore, ricordati di me: Please remember/think of me

Vengeance essays

Vengeance essays Arthur Millers The Crucible is a classic novel about the 1692 Salem witch trials. In that year nineteen people and two dogs were convicted and killed for acts of witchcraft. The reasons behind the accusations resulted in many disagreements that happened over the years. After the accusations began, grudges began to surface in the community. Small insignificant actions were made out to be witchcraft, and the devil was responsible for bad business deals. One of the main characters John Proctor stated it best when he said, Vengeance is walking Salem. (Miller 73) The in the beginning of the book the girls in the village have been caught dancing in the woods. As one of them falls sick, rumors start to fly that there is witchcraft going on in the woods. Once the girls talk to each other, they become more and more frightened of being accused as witches. After telling the truth to Revered Hale and Revered Parris Abigail starts the accusations by saying, I go back to Jesus; I kiss his hand. I saw Sarah Good with the Devil! I saw Goody Osborne with the Devil! I saw Bridget Bishop with the Devil! Another girl, Betty, continues the cry with, I saw George Jacobs with the Devil! I saw Goody Howe with the Devil! (Miller 45) The other girls all join in so that the blame will not be placed on them. In Act Three of The Crucible, the girls were called before the judges to defend themselves against the claims that they were only acting. John Proctor convinced Mary Warren to testify against the girls. Mary knew that if she told the truth that the other girls would turn on her and accuse her of being a witch, but if she didnt tell on the girls then John Proctor would kill her. During the court proceedings Abigail acted as if Mary Warren sent her spirit up to the rafters and began to talk to the spirit. Oh Mary, this is a black art to change your shape. No, I cannot, I cannot stop my mouth; it ...

Trade Protectionism And Worldwide Economic Contraction Case Study

Trade Protectionism And Worldwide Economic Contraction - Case Study Example Economic protectionist laws are struck down on the basis that the state has not used a more equitable means of achieving its goal. Thesis Statement: The purpose of this paper is to investigate economic protectionism, explain the rationale for governments implementing protectionist policies and evaluate whether these policies were successful or otherwise. For example, when the purpose of a law is to shield Alaska’s infant timber processing industry from the effects of interstate and foreign competition, it is deemed as invalid. Similarly, a state’s labeling law in the apple growing industry would be considered to be economic protectionist if it were meant to prevent apple growers in other states from selling their fruits in the former state. Thus, where economic protectionism is a law’s ultimate goal, the measure can be held to be unfounded. However, if the apple growing state argues that requiring the use of a specific grade is a reasonable method to protect cons umers against fraud and deception, the court would most likely accept this argument (May & Ides 350). On the other hand, economic protectionism is also considered to be damaging if it is merely a means, a stepping-stone, or an intermediate goal towards the attainment of a legitimate end. For example, â€Å"a genuine quarantine law that bans the importation of diseased crops or animals is not economic protectionism if it was adopted for health reasons† (May & Ides 352) even though it has the incidental effect of shielding local sellers from competition from other states. Although quarantine laws are not invalid in themselves, they may be invalidated if they fail to meet one of the other requirements of the dominant Commerce Clause analysis. The Argument Against Economic Protectionism Support for continued trade liberalization may be declining, as the results from recent polls and political rhetoric suggest.

Analysis of the attempted merger of AT&T and T- Mobile Research Paper

Analysis of the attempted merger of AT&T and T- Mobile - Research Paper Example Both the organizations contended that the proposed merger lacks the capability to affect the wireless service competition. They stated that other wireless service providers can easily replace the competition lost because of merger and the merger would dwarf the effects of anti-competition. AT&T hoped to buy T-mobile from Deutsche Telecom with the deal amounting to 39 billion dollars. With the effect of the deal AT&T became the largest mobile phone service provider in United States as the deal came with more than 33 million subscribers. If the deal would have been accepted AT&T would have enjoyed a market share of 43% widening the gap with the competitors further (Communications Workers of America, 2011). Research questions Whether the attempted merger between AT&T and T-mobile good or not. Literature Review and Analysis Some researchers posed the thought that the merger would contribute to enhance the market power. The wireless market as well as the post paid market is highly concent rated at the national level using the brink of guidelines of Horizontal Merger. The concentration falls in the range where DOJ and FTC conclude. The guidelines provide that concentration and market shares are measured on revenue basis. The revenues are attributable to the facilities based carriers in the wireless market. Using Herfindahl-Hirschman index they showed that the approach will contribute to enhance market power. It was found that T-mobile continued to be the significant competitor within the market structure (The New York Times. 2011). The other competitors did not have the capability to deal with the slack that resulted from the elimination of T-mobile from the framework of competition. The efficiency claims of AT&T were overstated and the efficiencies resulted from the merger was not good enough to overcome the effects of anti-competition. It was also found that the merger was likely to increase the competitive disadvantages for the other players in the market (Besen, K letter, Moresi, Salop and Woodbury, 2012). The costs got higher while the quality standard got reduced. The effect was also felt on roaming services by limiting the access of the players on leading edge handsets. The competitive significance of the players would have suffered and would have led to recreation of wireless duopoly. The prices of wireless services fell and reversion to effective duopoly would reverse the gains from wireless competition. The merging companies were not offering differentiated products at different local prices on the basis of local conditions of competition. Therefore it was necessary to evaluate the competitive effects of national market as well as the separate conditions in different local markets (The Centre of Media Justice, 2012). If concerns are found at the national level then it would not be possible for the concerns to take care of the localized markets. At one time the Guidelines of merger stated that only small antitrust markets would be analyz ed but the approach is ignored by antitrust agencies policies. If the deal would have really taken place the consumers would have been harmed by two waves. The current customers of T-mobile will now have to opt for AT&T’s expensive phones and data plans rather than the value priced smart phones and cheap data plans. The main aim of AT&T in the merger was to create a