Endothermic Reactions Demonstration

An endothermic process or reaction absorbs energy in the form of heat (endergonic processes or reactions absorb energy, not necessarily as heat). Examples of endothermic processes include the melting of ice and the depressurization of a pressurized can. In both processes, heat is absorbed from the environment. You could record the temperature change using a thermometer or by feeling the reaction with your hand. The reaction between citric acid and baking soda is a highly safe example of an endothermic reaction, commonly used as a chemistry demonstration. Demonstration Do you want a colder reaction? Solid barium hydroxide reacted with solid ammonium thiocyanate produces barium thiocyanate, ammonia gas, and liquid water. This reaction gets down to -20Â °C or -30Â °C, which is more than cold enough to freeze water. Its also cold enough to give you frostbite, so be careful! The reaction proceeds according to the following equation: Ba(OH)2.8H2O (s) 2 NH4SCN (s) -- Ba(SCN)2 (s) 10 H2O (l) 2 NH3 (g) Materials 32g barium hydroxide octahydrate17g ammonium thiocyanate (or could use ammonium nitrate or ammonium chloride)125-ml flaskStirring rod Instructions Pour the barium hydroxide and ammonium thiocyanate into the flask.Stir the mixture.The odor of ammonia should become evident within about 30 seconds. If you hold a piece of dampened litmus paper over the reaction you can watch a color change showing that the gas produced by the reaction is basic.Liquid will be produced, which will freeze into slush as the reaction proceeds.If you set the flask on a damp block of wood or piece of cardboard while performing the reaction you can freeze the bottom of the flask to the wood or paper. You can touch the outside of the flask, but dont hold it in your hand while performing the reaction.After the demonstration is completed, the contents of the flask can be washed down the drain with water. Do not drink the contents of the flask. Avoid skin contact. If you get any solution on your skin, rinse it off with water.

Women s Liberation The Lack Of Involvement From Women

Samantha Tellez Mrs. Austermann English 11 March 31, 2015 Women’s Liberation Envision the lack of involvement from women in society before the 1960’s. The world was limited for many women in every component of their daily lives. Before the movement, women were expected to follow a certain procedure such as getting married in their early ages , creating a family, and then managing the home.According to a woman during that period of time â€Å"The female doesn t really expect a lot from life. She s here as someone s keeper — her husband s or her children s.†(The 1960S-70S American Feminist Movement:Breaking Down Barrier for Women ) As such wives bore the full load of housekeeping and child care, spending on†¦show more content†¦Purposely divided from each other, each of us is ruled by one or more men for the benefit of all men. There is no personal escape, no personal salvation, no personal solution.† (Toward A Female Liberation Movement, 1968) They felt as if they had no rights and that they were purposely divided from men. Soon after the women’s liberation movement started many women started to work in the professions and having an effective position in societal life. Hoping to create a balance between men and women in society, by finding a unified solution. They believed that if they wanted a long term change in society they had to join together to fight for political power. The movement consisted of groups, protests, and a variety of group actions supporting women and their freedom. Elizabeth Cady Stanton and Lucretia Mott were inspirations to the Women’s Liberation Movement. Elizabeth Cady Stanton was a women’s rights’ activist and a writer. Lucretia Mott was also a women’s rights’ activist. Together they held the Seneca Falls convention , where they created the â€Å"Declaration of Sentiments†. They were both concentrated on promoting women’s rights’ and suffrage. They traveled to give speeches and lectures about women’s rights’ also calling for an amendment to the constitution giving women the right to vote. These women were strengthened by their successes; as one said, I knew I was a part of making history...It

Information Systems Implementation and Organisational Change Managemen

Question: Discuss about the Information Systems Implementation and Organisational Change Management. Answer: Introduction Here in this report we are going to discuss about information systems. We all know that information systems has changed our lives and now it has become easy for us to manage our information through these systems. The way of communication and information sharing has also become changed at global and local levels. The purpose of this report is to discuss working of information system and it enhances performance of company. Besides this, we will also emphasize on to challenges of information system for organization and society as whole (Smallbusiness.chron.com, 2016). How Information System Works and how does it enhance overall performance of company. In our business organization, Management Information System is used that is commonly known as MIS. Management Information System is study about people, technology and organizations. In our organization, MIS performs various day to day business activities such as management of pay bills of employees, their profile information and information about customers order and billing. Management Information System (MIS) works on the base of accurate and organized form of information. Therefore, in our management information system, appropriate information is stored according to requirement and on the behalf of that information all operations are done and decision making is also done. Whenever services or products are purchased by customers from our stores then their personal and credit card information is stored into our information system with purchasing order. On the behalf of this information, billing is generated for that customer. Then customer pays amount accordingly. This is a quick and reliable way to generate bills. This feature of MIS has made easier for our organization to manage customers and also payrolls of employees can also be managed through this system. By using this system, companys performance has increased, because now there are lack of conflicts, lack of inaccuracy of data and inappropriate decision making (Management Information Systems, 2016). Identify Challenges of Informatics to Organizations and Societies. There are various informatics or information management systems are available that can be implemented in business organizations for handling their day to day business activities. As we have discussed above that how a management information system is beneficial for us. But these information systems or informatics also consist of some challenges that are faced by business organizations and society. These challenges are listed as below (Eprints.port.ac.uk, 2016): The first challenge of informatics to organizations is to selection of system according to requirements of company. If selected system is not working according to requirement then it may lead to loss of organization. Other challenge is regarding maintenance of information system that is used in business organization. There is requirement of a professional who can maintain system and its performance. The maintenance of informatics is costly. In case of society, it is also a challenge to manage informatics due to issues of security and privacy of data. For a common user, it is not easy to handle complexities of system and its protection from vulnerable security attacks (Alvarez, 2016). References Smallbusiness.chron.com. (2016). Common Problems in Management Information Systems. Retrieved 16 December 2016, from https://smallbusiness.chron.com/common-problems-management-information-systems-63376.html Eprints.port.ac.uk. (2016). What challenges do organisations experience during informations systems implementation? With specific reference to a dairy company as a case study - Parade@Portsmouth. Retrieved 16 December 2016, from https://eprints.port.ac.uk/419/ Alvarez, A. (2016). Challenges to Information Systems Implementation and Organisational Change Management: Insights from the Health Sector in Ecuador. Ejisdc.org. Retrieved 16 December 2016, from https://www.ejisdc.org/ojs2/index.php/ejisdc/article/view/101 Management Information Systems. (2016). What is MIS?Retrieved 16 December 2016, from https://mis.eller.arizona.edu/what-is-mis

Water Symbolism Throughout The Novel Essay Research free essay sample

Water Symbolism Throughout The Novel Essay, Research Paper A Farewell to Arms, by Ernest Hemingway, is a narrative about love and war. Frederic Henry, a immature American, works as an ambulance driver for the Italian ground forces in World War I. He falls tragically in love with a beautiful English nurse, Miss Catherine Barkley. This calamity is reflected by H2O. Throughout the fresh Ernest Hemingway uses H2O as metaphors. Rivers are used as symbols of metempsychosis and flight and rain as calamity and catastrophe, which show how H2O plays an of import function in the narrative. Rivers in A Farewell to Arms represent metempsychosis. They symbolize a going from a old life and an entryway to a new one. The first grounds of this comes during the retreat of the Italian military personnels from their station. While walking with his fellow soldiers, Frederic is arrested and frights that he will be executed. We will write a custom essay sample on Water Symbolism Throughout The Novel Essay Research or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page # 8220 ; He jumps in the river with a splash # 8221 ; leting it to drift him along. It is like when Frederic jumps in the river, he is baptising himself and cleansing his psyche. The trip down the river gives him clip to believe about his future life with Catherine, even though he is unsure if there will of all time be a hereafter between them once more. The river finally takes him to a railway where he makes the determination that he is done with the war and that he made his # 8220 ; farewell to weaponries # 8221 ; . Hemingway uses H2O as a metaphoric cleaning for Frederic? s past experiences. When Henry emerged from the river, it was as if he was reborn. Rivers in this novel can besides be a symbol for an flight. Weeks subsequently, when Frederic hears from the bartender about his expected apprehension, he and Catherine flight for Switzerland by boat. They leave their old lives behind in hunt of a clean start in Switzerland. They row along the river, eventually making their finish. Upon their reaching they are # 8220 ; arrested # 8221 ; , but so rapidly released. It was once more as if the river has established an chance to take a new life, off from the war in Italy to a more comfy life. Henry? s and Catherine? s flight through the river non merely leads them to a better life but the unborn kid, excessively. As a symbol of calamity rain is often used by Hemingway in this novel. Rain is a symbol of catastrophe already get downing in the first chapter when the reader learns that the war is non traveling good and that the # 8221 ; the lasting rain broug ht the cholera† . Here rain is related to illness. Rain besides falls when Frederic and Catherine are looking for a hotel room so they can be together before Frederic must go forth for the forepart. Catherine buys a nightie for the eventide. And when they find a room, she looks in the mirrors and feels cheap, while Frederic looks outside at the storm. The rain degrades the farewell of Frederic, and Catherine tells him that? [ she ] neer felt like a prostitute before† . Rain besides falls during the troop’s retreat which is typifying a failure. One dark when Catherine and Frederic are in the hotel in Italy, Frederic awakens to the sound of rain and learns that he will be arrested. And during their clip of flight from Italy to Switzerland it is really blowy and showery. That symbolizes how their flight would decidedly be hard. It takes them many hours to row to Switzerland? s shore. A 2nd function that rain dramas in A Farewell to Arms is to reflect decease. On a # 8220 ; rainy twenty-four hours # 8221 ; when Frederic is retrieving from his hurt, Catherine describes the conditions as chilling. She tells him that she is afraid of the rain? because sometimes [ she ] sees them dead in it. # 8221 ; This may be interpreted as significance that rain is an portent of decease. And Hemingway foreshadows through this sentence how rain will symbolically hinder and stop their relationship. When the clip comes for Catherine to hold her babe, it is raining once more and it continues to rain during the bringing. It is still raining when she and the kid dice, which proves Catherine # 8217 ; s frights to be right. Hemingway uses rain as a mark of decease, unhappiness or to give one of his characters the province of being afraid. The desperation brought by rain, Frederic says? adieu to [ Catherine ] , and so? [ leaves ] the infirmary and walk [ s ] back to the hotel in the ra in # 8221 ; . The rain described as he walks place represents once more a cleaning in which Tenente will be forced to get down a whole new life now. Ernest Hemingway uses H2O as a metaphor that foreshadows events in A Farewell to Arms. He distributes H2O through the full narrative. Escape, or a ablutionary consequence, of Frederic Henry takes topographic point in a river. Rain predicts unfortunate events, such as the decease of Catherine, which causes Frederic to unhappily get down a new life. However, this clip he does non hold a comrade # 8211 ; he must larn to last entirely. Hemingway uses a batch of H2O to demo many symbols and impact the narrative.