The Activation Energy of Bromide ion and Bromate ion :: Chemical Reactions Reaction Rates Essays

The Activation Energy of Bromide ion and Bromate ion To Determine the Activation Energy of the Reaction between Bromide ion and Bromate (V) ion in Acid Solution Objectives: By reacting Potassium Bromide and Potassium Bromate in the acid solution in varies temperature, we can then determine the Activation Energy of the reaction in different temperature through the equation:[IMAGE]. Questions: 1. Give an equation for the reaction between phenol and bromine. 2. What is the use of methyl orange in this experiment? The methyl orange is used as an indicator for the reaction. Bromine will be produces during the reaction and it will react with phenol rapidly. Once all the phenol is used up, further bromine produced will bleach the methyl orange immediately. So the rate of the reaction can be calculated from the time for the indicator to be decolorized. 3. Based on your results, is it advisable to perform the experiment at high temperatures such as 80à ¢Ã¢â‚¬Å¾Ã†â€™? From the above results, the time of the reaction is shorter as the experiment temperature increase. So it is not advisable to perform the experiment at high temperatures as the time of reaction is too short, it is not easy for us to record. 4. Why is it not necessary to know how far the reaction has proceeded at the point where the methyl red is decolourized? In the experiment, the number of mole and the molarity of each chemicals used are the same. And the appearance of the pink colour only determines that there are some content of the reaction has processed. As the result, it is only necessary for us to compare the time required for the reaction mixture to reach the point the decolourization occurs at different temperature. 5. The Arrhenius equation can be represented as: (a) Can substitute k in this equation? Why? Can substitute k in this equation. As in the above experiment, the initial rate can be represented by due to the constant concentration of the reactants. Also the rate constant k is proportional to the rate of the reaction when the temperature changes.

Case Study: System Development Essay

System development is a process in which programmers with organization contribution write codes to solve a problem that face the organization system or automate a procedure. There are three major systems development techniques that been used to solve systems’ problems. The system development techniques are SDLC (Systems Development Life Cycle), JAD (Joint Application Development), and RAD (Rapid Application Development). SDLC provides tools for controlling details within large development projects that solve structured problems. JAD enables the identification, definition, and implementation of information infrastructures. RAD supports the iteration and flexibility necessary for building robust business process support(Osborn, 1995). In this case study, the manager been asked to design, develop, and install a Patient Management Information System for a medical clinic in which three physicians practice general medicine. This system has to be operational in 6 months. There is one individual in the clinic staff who is reasonably well informed about information technology. Thus, the manager needs to determine which system development methodologies will use to solve this problem. To choose the appropriate development system, the manager need to use a process which consists of s (1) defining requirements, (2) designing an information system to fit those requirements, (3) building the code to deliver that system, and (4) testing to see whether the code works and the system does the job it was intended to do(Osborn, 1995). The requirement for this case study is to design and develop and install a Management Information System for a medical clinic that has three physicians within 6 months. Based on that, this process will take longer if we use the SDLC which is the traditional method that need narrative descriptions, data definitions, and sample screens. Moreover, producing a thorough, often multi-volume description of system requirements can become such a time-consuming task that it begins to extend the expected life of a development project. On the other hand, JAD tends to rely on data models to provide requirements definition and prototypes to capture final design details. The data modeling can produce thorough system specifications more quickly than SDLC narratives, especially through the use of computer-aided software engineering (CASE) tools. The RAD relies on a series of iterative prototypes to specify and document requirements. The technique reverses the scheduling emphasis normally found in SDLC projects by setting a rolling series of release dates and dynamically adjusting system features to fit. Iterating prototypes gives requirements the opportunity to evolve and the flexibility to change if needed(Osborn, 1995). Since the project is for small clinic, which mean that the budget is limited. SDLC to the use of expensive mainframes to understand transactions, JAD to the need for managing data distribution following the advent of minicomputers, and RAD to the development of business process support based on networked client/server workstations. SDLC provides tools for controlling details within large development projects that solve structured problems. JAD enables the identification, definition, and implementation of information infrastructures. RAD supports the iteration and flexibility necessary to building robust business process support. Thus, based on the information that discussed earlier, I recommend using the RAD method because the clinic is small one which needs inexpensive system and the system will need support especially that there is only one person who informed about using information technology. In addition, the time limits that clinic has will fit also the RAD method. Literature showed that RAD proves most useful for systems support of unstructured business processes. This not means that this system will limit the business because when the business grows up the system can move for more structure system(Osborn, 1995). References Glandon, G., Smaltz, D. & Slovensky, D. (2012). Information Systems for Healthcare Management. Chicago, IL: Health Administration Press. Osborn, C. (1995). SDLC, JAD, and RAD: Finding the Right Hammer. Center for Information Management Studies, Working Paper 95-07.

A Research Study On Cell Phone Essay - 1046 Words

1 INTRODUCTION: In this present day time of innovation, world is moving quicker with the structuring of programming and its applications which makes the advancement at quick rate. Also, programming in cellular telephones is one of the cases of the mechanical advancement. Cellular telephones have turned into a part of human s regular life. There are more than six billions versatile clients on the planet. Each cellular telephone has fittings and a specific programming called a working framework. There are numerous portable working frameworks accessible. It makes the Pads easy to understand and more effective on occasion. This study is about investigating the decisions of the product which is basically favoured in today s business primarily among the adolescents. Here, we are taking the school understudies as the premise for our study. Programming inclination are basically application particular design alternatives that a client can change to suite their specific needs. This study concentrates on young sters between 16 to 25 years old with experience utilizing cell phone engineering. The study directed up close and personal meetings to examine the view of cell phone OS. What is Operating System (OS)? Article on Operating System (Webopedia, n.d.) characterizes working framework as „the most critical program that runs on a machine. Each universally useful machine must have a working framework to run other programs‟. Thus, OS considered as the spine of any devices as itShow MoreRelatedThe Research Methodology of Cell Phone Health Risk Studies Essay1952 Words   |  8 PagesCellular telephones have transformed and accelerated communications over the past four decades. The benefits of cell phone technology are clear, most notably in the creation of an increasingly mobile and global business sector. 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