Wednesday, January 29, 2020

Investigation into temperature change Essay Example for Free

Investigation into temperature change Essay Introduction. The following is an experiment into temperature change in an exothermic reaction taking place between Sodium hydroxide (NaOH) and Hydrochloric acid (HCl) and also how the concentration of the acid will vary these results. The characteristics of the reaction feature a neutralisation, an energy change (shown as a temperature change) that is usually exothermic (gives out heat). The reaction of neutralisation is exothermic because of the bonds being broken and made in the reaction. When bonds are broken, energy in those bonds are taken in, and in this case, are noted as a temperature change, the temperature increasing. If it were an endothermic reaction, the temperature would lower, because the reaction is using up more energy breaking the bonds, this is noted and a temperature change, this time, showing how temperature decreases. The acid and alkali compounds dissolve into water, acid into hydrogen ions, and alkali in hydroxide ions. Neutralisation with hydrogen and a hydroxide, at the end, the product is water (also with left over sodium chloride). There is energy released in kilojoules when a reaction takes place. The main aim is testing the effect of different concentrations and the effect it has on temperature. Variables. To make this test fair, we must only change one variable, that being the concentration of the hydrochloric acid, but we must also make sure, that the alkali concentration is constant. Also, for the sake of fair testing, the room temperature must stay the same, as is will vary results greatly on day to the next. Trial run. The trail run was to determine a number of details; The first, being the correct ratio of concentration, what I mean to say is, how many cubic centimetres the solution of acid and water will vary each time we do the experiment. We have decided to each time, keep the volume constant at 25cm cubed, but diluting the acid by 5cm cubed each time. Also, we decided that the use of polystyrene insulation was not needed as in the trail run; it had no real effect on the end temperature. Apparatus. The following is a list of apparatus we used with the experiment: 1) Burette 2) Measuring cylinder X 2 (0-50cm3) 3) Digital thermometer (with a temp range of -50 degrees Celsius to 150 degrees Celsius.) 4) Beaker Safety. Within safety, basic labs rules apply, these include, clear workstations and no loose clothing, but special safety rules must be out in place for this, as the use of acids and alkalis, safety goggles need to be worn. Step by step plan. First, gather up all equipment needed in experiment, then, measure volumes and concentrations that are needed in the experiment. Then, record the start temperature, after that, mix together the acid and alkali in the beaker, and wait until its peak temperature, then record it. Repeat this three times in order to check for reliability. Use exact guidelines on this to repeat experiment for different concentrations. Accuracy. In accuracy, we use the preset variables we also make sure that volumes and concentration are constant and accurate. Prediction. My prediction of what will happen is that when the acid is added to the alkali, the reaction will cause the temperature to go up, but with each concentration the temperature rise will go up, but not to the same extent of what is was beforehand. This prediction was come to with collision theory in mind; the double the temperature the double the amount of successful collisions, meaning double amount of heat being given off. Once the acid is in excess there will be no further temperature rise. Results Table Conclusion In conclusion, I conclude that my graph follows the directly proportional trend because the science in my prediction was correct (higher temperature, more collisions, more heat given off). This shows my prediction was correct, and that all the science within this experiment in. Evaluation My repeats in the experiment were close, and that would mean that they were, and still are reliable. Also, within these repeats there were no anomalous  results, this again showing a well carried out experiment. My method worked extremely well, and I feel it is the best possible method to use in further experiments. But if needs be to change the experiment in some way, perhaps difference in the concentration of the alkali instead of the acid, may alter the results in someway. Even the use of either more controlled conditions or different insulation is something to look into. Choosing another variable to control is also a feasible option.

Tuesday, January 21, 2020

Virtual Communities: A Sociological Perspective From Pastoral Village t

The technical, functional, and symbolic characteristics of the Internet may have changed the ways that communities are formed and experienced through a decentralized global communication network that transcends physical time and space. While this notion of â€Å"virtual community† is closely associated with the emergence of information communication technologies (ICTs), the idea that communities can be seen as series of social ties that vary in density, size and nature is not a novel concept. The rise of cities and urban centers as a result of industrialization have long concerned sociologists, many of whom (e.g., Wirth, 1938; Woodsworth, 1911) feared that traditional social relations that permeated folk communities may be transformed and even threatened by the growth of contemporary metropolis. The development of traditional mass media (e.g., print, radio, and television) had contributed to the process of urbanization by serving as a means of communication for both social an d commercial activities. To understand what the Internet may mean for human communities in today’s social and technological context, it is necessary to first explore the changing conception of â€Å"community† before the arrival of computers. While the existence of a community is typically defined by the types of social ties formed by its members (e.g., family or work) and by the physical boundaries that it occupies (e.g., neighborhoods or towns), the idea of community can be traced to ancient social and political thought, ranging from the five fundamental relationships in Confucianism to Plato’s ideal republic. During the Enlightenment period, philosophers such as Locke (1988/1689) and Rousseau (1998/1762) wrote extensively about the ways in which individuals enter t... ...ace of community in the age of digital communication technologies. As a result, it is the person, rather than issues associated with the change in physical environment (e.g., urbanization, migration), becomes the new focus of the community research in the information age from a sociological standpoint. For example, what motivates individuals to join virtual communities? In what frequency and capacity do individuals interact with multiple social groups? And to maintain what kind of social relations? These are some of the emerging questions that community scholars will soon have to answer. It is for this reason that the study of community must move beyond the realm of sociology and incorporate perspectives from psychology in order to obtain a more compete picture of what has, and what has not, changed as a result of the networked environment at the individual level.

Sunday, January 12, 2020

Event That Changed My Life Essay

When I was in second grade, my dad and I did not get along very well. I used to think my father did not care about me. I would get frustrated with him because he would get mad at me about my grades and my behavior at school. I felt that there was no way that I could please my father. It made me lose all hope; I felt that I would just be a failure for the rest of my life. He would tell me that I did not care or try hard enough to get good grades. He was right. When I was younger, I did not care about grades. I had a friend who was a troublemaker. One time, we had to go to the office because we had a coat hanger sword fight in the locker room with some other kids. I went to the office so many times that year, and I am lucky I did not get kicked out of school. My dad did not like my bad attitude, and he helped me shake it off over the next three years, but it was not some mere walk in the park. It was a rough path my dad and I were on. I hated my dad back then, and I did not love him. I thought he was out to get me, but I am glad that he persisted in helping me. I eventually realized that he was trying to help me, but that was not until around fifth grade. One day, in fifth grade, our anger and frustration had built up, and it erupted into a huge fight. â€Å"How can you say that you love me and care about me?† I yelled at my dad. No, I would not believe it! There was no way he could say that to my face! I continued shouting, â€Å"All you ever do is punish me, ground me, and get mad at me!† Instead of the rage and anger I had expected, my dad grasped me in a hug and whispered in my ear, â€Å"You will not understand how much I love you until you have children of your own.† He went on to tell me that he wanted the best for me and that he was trying to discipline me so that I could take care of my own family one day. Read more:  A Book That Changed My Life Essay It was as if my eyes were opened. I realized my dad was trying to help me, and that he did love me and care about me. I understood that to be able to have children, I would need to discipline them like my dad had done with me. To take care of them, I would need money from my job. It was then that I understood that my dad was preparing me for the future, and I will never be able to thank him enough for that. That is why I love my dad so much. I remember when my dad read a paper I wrote in seventh grade. It was about who inspires me the most. He read it and asked why I said he inspired me the most. I answered, â€Å"That day, that one day back in fifth grade, it all clicked in my brain. I love you dad, and you are my inspiration.† All my dad replied with was a smile, and I could tell that meant a lot to him. Whenever someone asks me who inspires me the most, I always answer, â€Å"My dad is who inspires me the most.† Without my dad, my future would have been destroyed by my past actions. My dad has changed my life for the better. Through the pain I felt, through the tears I shed, through the rage I released towards my father, I have realized my dad does love me. He has also shown me how important it will be for me to discipline my own children, and how good grades will help me get a good job so I can take care of my family. My dad and I are closer than ever now, and I can not believe I ever hated him. I guess sometimes it takes difficulties and arguments to really show you how much someone cares about you.

Saturday, January 4, 2020

Benefits Of Social Media Marketing - 1040 Words

Has this year come to an end and you still haven t worked on your social media strategy? For sure, it has been on your mind each day, and each day you promised yourself tomorrow is the day. Tomorrow is the day you will begin dedicating time to creating a social media strategy and implementing that strategy. Unfortunately, tomorrow has come and gone and social media is still a concept buried in your mind among the other million and half things you have to get done for your business. Don t feel bad. A significant number of small businesses were in the same boat as you. Yet, to not lose out on the vast and indisputable benefits of social media marketing, they decided to employ someone else to oversee their social media. It would not be surprising to find out that your very competition has outsourced their social media marketing. 62% of companies outsource their content marketing -Demand Metrics If you are wondering how well a hired party can post in the voice of your business, the answer is better than you think. Reputable and experienced professionals and agencies invest the necessary time and pose the right questions to learn about the brand. Many focus on certain industries, therefore giving them an advantage in serving their customers. Ask yourself these questions to find out whether outsourcing your social media marketing is right for you and your business. Do I or my staff have the time? The answer is probably no otherwise you would not be in theShow MoreRelatedThe Benefits Of Social Media Marketing1161 Words   |  5 PagesAvoid These Mistakes And Your Marketing Plans Will Be Successful Whatever your business is, you are either selling a service or selling a product. 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