Rate of reaction Essay Example for Free

Rate of reaction Essay Evaluation: I think that overall, our experiments/investigation was successful except for minor things such as the occasional odd results. On the first graph, these can be identified as when the lines representing 1. 25 and 1. 5 molar kept on crossing over each other. They were very similar. In theory, all the lines should be apart because the rate of reaction should be increasing every time. Another odd result is that on the second graph, the point which represents 1 molar is no where near the line of best fit. All points should either lie on the line or be pretty close to it. I believe that we got these odd results because our human errors. We may not have collected all the gas produced. Or the gas could have been caught in the collecting tube and this may have resulted in the long time needed for the reaction. I believe that the method provided with us has a few faults that I would like to point out. Firstly, when the magnesium piece is dropped first, then the acid poured, time is taken for the all the acid to drop but as soon as the first drop touches the magnesium it will react. This means that hydrogen gas would have been produced when pouring in the acid and lost through the open top. To change this, I would say in the method that the acid should be poured in to the test tube first then the magnesium piece, as the cork can be replaced without the metal touching the acid and no hydrogen gas would be lost. Secondly, gas can get trapped in the collecting tube as it faces down. When the first amount of gas is produced, it is followed by more which results in the gas pushing forward for more space because it cant be compressed. When the last amount of gas is produced, nothing is there to push it forward so it just floats around without reaching the measuring cylinder. I dont really have any improvements for the method but you could try to keep the measuring cylinder closer to the test tube and keep it at an elevated position. This way, more gas reaches it. We should have taken more care when handling the glass equipment as a measuring cylinder had been pushed over the ledge of the worktop and smashed when it had contact with the ground. Overall, the method was good but like everything else, it could be improved. It was generally a fair test but a few things may have altered the results, such as after a few of the first experiments, one of the windows was opened in the room and cold air rushed in. I dont if this had anything to do with the experiment but it could be something to think over when planning the next investigation. I feel that the measurements were easy to take measurements as we didnt miss a single reading. We could have repeated the experiment once more to be a little more accurate, the more results there are, the better it is after all. All the graphs showed a pattern to do with the concentration levels of the acids, the trends got higher for rate of reaction, the time decreased for stronger acids and less time was taken to. We kept the few odd results we got as it gave us something to talk about and think about in the future. I strongly believe that the results that we got, supported our conclusion as no matter whose results you saw, all showed the same trend and this proves that the results were reliable. Next time, I would use more concentrations of acids, so that we can be even more accurate and sure about the results. Further investigations you could think about could be changing the temperature of the experiment and investigate if it alters your experiments at all. You could also change the surface area of the metal such as having a block, or reacting it in a powder form. Catalysts could be added to the reaction to see if they show a major difference. 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.

Compare and contrast the view that ‘An Arrest’ is a tale of nature Essa

Compare and contrast the view that An Arrest is a tale of nature rejecting a human villain with the view that it is concerned only with a vengeful superego ‘An Arrest’ is an ambiguous story. You can look at it in different ways. One way to see it is as a tale of nature rejecting a human villain. This view is put forward right from the beginning. When the narrator uses words such as â€Å"confined† and â€Å"fugitive† to describe the state of Orrin Brower, he creates the image of an animal isolated from human society. This is because ‘confined’ is usually a word to do with animals or mad people who are not allowed to be in contact with humans Further evidence to support the argument of Orrin Brower being portrayed as a savage beast comes when the author writes that he had, â€Å"recovered liberty,† which is like an animal being released into the wild. Orrin Brower does not feel guilty for beating Burton Duff or think of the consequences of his actions, as a human would; he only feels and acknowledges his freedom which is an animal-like thing to do. When he is on the run he decides to escape to the forest which may be as he is treated like an animal he starts to believe that he is one. The fact that the narrator states ‘he had the folly to enter a forest’ suggests that even though he thinks of himself as an animal, Brower is not and therefore does not belong in the forest- this proves that nature will inevitably try to discard him. As he enters the forest, we are told that ‘the night was pretty dark with neither moon nor stars visible’ which could be seen as a nature trying to confuse Brower. We begin to doubt Brower’s animal-like image when Bierce writes, â€Å"Brower had never dwelt thereabout, and knew nothing of the lay ... ...re following him to the prison was not human at all. As I mentioned earlier Brower has committed some serious crimes which are the result of the id part of his brain taking over. The id is the part of our brain which wants all our basic needs- our Inner Desires- such as sleep, food and sex. However our superego stops us from becoming lazy, greedy or rapists. What happened to Brower is that his id took over and his superego was shunned so he committed these crimes without any guilt. At the clearing in the forest, Brower’s superego suddenly starts operating again and conjures up the image to make the guilty conscience, which comes with it, disappear by sending him back to justice. Bierce seems to have dropped many hints to leave both views arguably correct. Personally, I think Bierce has done this deliberately to leave the story as ambiguous as the title.

Business in context

What responses do you have to the reading or video e. G. Fresh understandings, opinions, Insights or questions? What connections does the related additional reading or video have with the required reading or video? How does It reinforce or critique the ideas In the required reading/evolved? This reading presents us the approach of utilitarianism, real life cases that related to utilitarianism, three common mistakes that people usually make when they applying Utilitarianism and the difficulties of measuring utility.Case 1 When Ford motor company was having dilemma of modifying pinto's gas tank or keep the original design, they chose to use utilitarian approach to calculate the utility of tooth options and the result Is cost over benefit, so they chose to risk their customers' lives rather than correcting their poorly designed cars. Case 2 Lawrence summers The director of the white house wrote a memo that proposed shipping wastes form rich countries to poor countries is a beneficial ac tion to world's welfare and he make 4 arguments and I think the first 3 are supported by utilitarianism. Understandings: utilitarianism support that the right action is one that produces the most utility and minimizing the negatives, and the utility that reduced by the action Is not only for the person performing the action but also for all person involved in the action. Question: In the end of the reading it clearly states that health and life is beyond measuring, but Ford company and Lawrence they are putting a price on each person. Is not it would considering as an UN-ethical action? If it is not then I think we are nothing but slaves In this world.In my opinion the additional video is not quit related to the required reading. Peter singer's ethics says that every Individual has their own interests and It Is perfectly normal that we want to spend our money on expensive reduces under our own desires, but it will be considering as ethical action if a person spend money on contribut ing the would instead of buying luxuries. And he also states that the purpose of life is making the world a better place by one's actions and presence. Lecture 2 Required Reading Reference: Shaw, W. Barry, B. & Sandburs, G. (2009). Moral issues In business (1st Asia-Pacific De. ). Melbourne, Australia: Coinage (Kantian ethics). Up 71-78 Lecture 2 Dilation Reading Reference: California Newsreel. (2008, December 2). Health for Sale . Retrieved from: http:// www. Youth. Com/watch? V=Jukeboxes Record a brief description of what the required reading was about. What responses do you have to the reading or video e. G. Fresh understandings, opinions, insights or questions?What connections does the related additional reading or video have with the required reading or video? How does It reinforce or critique the Ideas In the required reading/evolved? Kantian ethics consequences are, and the performer must motive by good wills. An action might looks like an ethical action but if it was motive by self-interests or there concerns then this action will be considering as lack of moral worth (recording to the shop assistant case) Formulate an universal law that applies on all our actions is what Kant wanted.And this categorical imperative rule is the measurement of ethic or UN-ethic. Understanding: After reading this article I realized that everything we do has a propose, if the foundation of the propose is good will then it is ethical, but if the propose is not based on good will then it is not ethical. Question: What if an action is following one's good will but in the same time it might break the universal law? This video is about UN-ethical behaviors of the world pharmaceutical market. 5% of drags were used on 11% of the people who need them and can afford them, But only 15% of drags were used on 89% of people who need them but do not have the money to buy them. And some drags are no longer producing because the people who need them could not afford them, the poor people are not the target of pharmaceutical market. This kind of behaviors is UN-ethical because drags were meant to help people not only focus on making profit, companies ignored the poor is not an action of good will recording to Kantian theory.

Paper - 1098 Words

Mental and substance use disorders account for about 7 ·4% of the global burden of disease (Whiteford et al., 2013). These mental disorders include various mood disorders such as major depressive disorder, anxiety disorders like post-traumatic stress disorder (PTSD), and substance use disorders such as alcohol abuse. A study analysing the results of the World Health Organization (WHO) World Mental Health (WMH) surveys found that post-traumatic stress disorder had one of the strongest associations with the lost human capital caused by individuals days out of role per year (Alonso et al., 2011). Post-traumatic stress disorder (PTSD), as its name implies, may develop after being involved in, or witnessing traumatic events (Mind, 2017). These†¦show more content†¦The International Classification of Diseases (ICD), first initiated in Paris, is the official world classification used by health practitioners across the world to record the diagnoses of all patients seen in psychiat ric care where official statistics are collected (Tyrer, 2014). The Diagnostic and Statistical Manual of Mental Disorders (DSM), published by the American Psychiatric Association (APA), is the official classification in the USA used mainly by psychiatrists for clinical diagnosis (Tyrer, 2014). The main differences between these classification systems include: the ICD focusing on primary care and low- and middle-income countries, while the DCM focuses on secondary psychiatric care in high-income countries; the ICD reducing the number of diagnoses with the focus being on clinical utility, while the DSM increases the number of diagnoses with each revision; and the ICD does not depend on operational criteria but instead provides diagnostic descriptions and guidance, while the DSM uses a polythetic system for most conditions which depends on operational criteria (Tyrer, 2014). These differences result in the latest revisions of these classification systems, the proposed ICD-11 and the DSM-5, diagnosing mental disorders like PTSD differently, with the ICD-11 criteria identifying less individuals than the DSM-5 (Hafstad et al., 2017). 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