Chemistry IA design format Essay Example for Free

Chemistry IA design format Essay 1.0.0- Introduction 1.0.1- Focus Question- If the mass of magnesium reacted with hydrochloric acid is changed will the temperature of the solution increase and the total mass decrease. 1.0.2- Hypothesis- If the mass of magnesium that is reacted with hydrochloric acid is changed the temperature of the solution will increase and the total mass will decrease. 1.0.3- Theory- The reaction between magnesium and hydrochloric reaction is written as follows, Mg(s)+ 2HCL (aq) (MgCl2(aq)+H2 (g) (Ng, 2008, pg 1). This reaction goes through two distinct changes that both have an effect on the energy change in the reaction. Enthalpy refers to changes in energy in a compound (Assut, 2008, pg 1). Two distinct changes can occur. An endothermic change occurs when the energy being absorbed is grater then the energy being released whereas and exothermic change is when the energy being released is greater than the energy being absorbed. Energy is absorbed when bonds are broken and energy is released when they are formed (Newton, 2008, pg1). Energy change cannot be directly measured. However energy change affects the physical force of heat. Therefore a heat change is indicative of an energy change. If the heat increase in the solution the change will be exothermic and if the heat decreases the reaction will be endothermic. In respects to the formula Magnesium forms an ionic bond with chlorine to form the salt magnesium chloride. When this bond is formed energy is released in the form of an endothermic change, this energy drop would be quite small however because the bond is ionic and does not take much energy to create since magnesium and chorine bond easily. However the second change is that hydrogen breaks off from chlorine in the hydrochloric acid and hydrogen is released as a gas. The breaking of bonds would absorb energy therefore forming an exothermic reaction. Hydrogen and chorine however form a very strong covalent bond. Covalent bonds form between atoms with similar electronegative forces and are there for take a lot of energy to break ( Anissimov, 2008, pg 1) Since the endothermic change is weak and the exothermic change is strong it can be predicted that the overall change will be exothermic and therefore the solution will heat up. Temperature change in a chemical reaction can be measured with a device known as a calorimeter. A calorimeter measures the heat of the solution before the reaction has occurred and then again after the reactant has been added (Whel, 2008, pg 1). These two values can be mathematically manipulated to find the relative change in temperature. If two of the same substance have different masses it means there is more of the one substance. In a mass of a substance there is a certain amount of material that can be reacted. By increasing mass the amount of substance that may be reacted increases. Therefore if mass increased the amount that of substance reacted will increase as well providing there is enough of the reactant. This will in turn increase the energy change. Also if more of the substance reacts with the reactant more of the reactant will be used up. This means that if the magnesium is increased there will be more reaction with hydrochloric acid; this means that more hydrogen will be released as gas and the total mass of the solution will decrease. Henceforth the change in heat should be greater if their entire solution is lighter as more of the hydrochloric acid has been reacted and hydrogen lost as a gas. How the reaction works (Figure 1) Mg(s)+ 2HCL (aq) (MgCl2(aq)+H2 (g) 1.1.0- Controlling variables 1.1.1- Variables (Table 1) Variable Type of variable Method for control Mass of magnesium Independent Mass will change for each sample, sample range will be 2g, 4g, 6g, 8g and 10g Heat change Dependent This will be calculated by subtracting the final heat of the solution by the initial heat of the solution. The data will be gathered by using a calorimeter Change in mass in solution Dependent This will be calculated by measuring the weight of the solution and subtracting the weight of the calorimeter and the magnesium. The original mass not including calorimeter and the magnesium will then be subtracted by this value to mind the change of mass in the solution. Initial temperature Controlled The temperature of the solution will be heated to 25c and the reaction started immediately. External temperature Controlled The room temperature will be controlled at 24c Volume of hydrochloric acid Controlled The volume of hydrochloric acid will be 40mls per sample. Measuring apparatus Controlled A 50ml calorimeter with electronic thermometer and a scale with milligram accuracy. Time of experiment Controlled The experiment will be ended when reaction is fully complete and reaction will be given 10 seconds to calibrate before results are taken Replications Controlled Standard 5 replications of each sample will be performed. 1.1.2- Control used in comparison- The reacted samples will be compared against hydrochloric acid with no magnesium that is also 25 degrees Celsius. Since the temperature remains constant there should be no energy or mass change, this would mean that on a graph this would represent a straight line which others samples with energy changes (heat changes) could be compared to. Bibliography Ng, H.N, 2008, Acid reactions, Vat.Gov.Un, Accessed 21/08/09, http://vat.maharashtra.gov.in/communicationcenter/QueryAnswerSubjectwise.php?start=3090subId=0000000007. Asset, M.A, 2008, Chemical Enthalpy, Nasa.gov, Accessed 21/08/09, http://www.grc.nasa.gov/WWW/K-12/airplane/enthalpy.html Newton, R.N, 2008, Energetics and bonding, Unknown sponsor, Accessed 21/08/09, http://www.webchem.net/notes/how_far/enthalpy/enthalpy_diagrams.htm Anissimov, T.A, 2007 Chemical bonding, Simon Frasier University, Accessed 21/08/09, http://www.chem1.com/acad/webtext/chembond/ Whel, L.W, 2006, Calorimeters, Stanford University, Accessed 21/08/09, http://www2.slac.stanford.edu/vvc/detectors/calorimeters.html Acknowledgments The procedure of this experiment is a adaption of a previous class experiment. The source of the procedure is unknown, so thanks to Miss Crook for the inspirations for this design.

Light and Darkness in The Scarlet Letter :: Scarlet Letter essays

Light and Darkness in The Scarlet Letter         Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Nathaniel Hawthorne's The Scarlet Letter is one of the most analyzed and most discussed literary works in American literature and for good reason.   Hawthorne's ambiguity and his intense use of symbols have made this work incredibly complex and incredibly bothersome.   In The Scarlet Letter, Nathaniel Hawthorne uses many symbols to give insight into characters and promote his views on society.   The scaffold scenes in The Scarlet Letter tell the reader exactly what is to come, and the presence of light in those scenes gives the reader insight into the characters.         Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The scaffold scenes establish a pattern of what is to come in the novel through a common tie prevalent in the three different scaffold scenes.   The tie is that of creation and release.   In the first scaffold scene, Hester releases not only her guilt about her crime, but, she also releases Pearl to the society and creates in Pearl the need for strength and determination that she will need to overcome the legacy of her creation. In this scene she also creates the need in Dimmesdale to absolve himself of his guilt.   The second scaffold scene is the opportunity for Dimmesdale to attempt to release his guilt from the first scaffold.   However, Pearl creates a need in Dimmesdale to repent in front of the town.   During the third scaffold scene, Dimmesdale is able to release his guilt about his crime and his lack of strength. He is also able to complete his obligation to accept the hands of Pearl and Hester on the platform from the second scaffold scene.   Through his confession, he creates a sense of reality for the entire town.   It can be clearly seen that what is created in the first scaffold is released in the second scaffold; while, the things created in the second scaffold are finally released in the third and final scaffold.         Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   There is another complexity to the scaffold scenes in the presence, or lack there of, of lighting.   The first scaffold scene is in the sunlight.   The sunlight in this novel is a symbol of disguise.   In the sunlight of the first scaffold, Hester is shown as strong and determined.   She gives the appearance that the letter does not bother her.

Carrer Path Nursing

The health field is my career of choice. Becoming a registered nurse is my ultimate goal. The nursing field is the best fit for me. I take pride in helping others whenever possible. There are many kinds of different field in the health industry that will fit me best. There are many different aspects as to why I want to become a registered nurse. The salary, responsibilities, skills and lifelong learning opportunities are what draw me to the health field. Becoming a registered nurse is one of my main goals during my time at Bryant & Stratton.When I finish school becoming a nurse means that I am responsible for health and sake of others. People will depend on me to provide the best service possible for them and the ones they love. On average in the state of Ohio a registered nurse in 2010 makes 44,000 to 78, 000 dollars a year (â€Å"Career One Stop,† n. d. , para. 2). The responsibilities that come with the job are endless. I will be keeping track of a patient’s health, drug dosage, growth of sickness and lending a helping hand to a doctor when needed. The skill I will need and obtain on the job will allow me to excel throughout the rest of my life.According to Career One Stop here are a few skill and abilities I will need and gain from the field: â€Å"Skills: Active Listening – Giving full attention to what other people are saying, taking time to understand the points being made, asking questions as appropriate, and not interrupting at inappropriate times. Speaking – Talking to others to convey information effectively. Critical Thinking – Using logic and reasoning to identify the strengths and weaknesses of alternative solutions, conclusions or approaches to problems.Judgment and Decision Making – Considering the relative costs and benefits of potential actions to choose the most appropriate one. Service Orientation – Actively looking for ways to help people. Social Perceptiveness – Being aware of others ' reactions and understanding why they react as they do. Abilities: Problem Sensitivity – The ability to tell when something is wrong or is likely to go wrong. It does not involve solving the problem, only recognizing there is a problem. Oral Comprehension – The ability to listen to and understand information and ideas presented through spoken words and sentences.Inductive Reasoning – The ability to combine pieces of information to form general rules or conclusions (includes finding a relationship among seemingly unrelated events). Oral Expression – The ability to communicate information and ideas in speaking so others will understand. Arm-Hand Steadiness – The ability to keep your hand and arm steady while moving your arm or while holding your arm and hand in one position. Information Ordering – The ability to arrange things or actions in a certain order or pattern according to a specific rule or set of rules (e. g. patterns of numbers, let ters, words, pictures, mathematical operations). Speech Recognition to identify and understand the speech of another person. †(CareerOneStop,† n. d. , para. 5). – The ability In this field there will always be room for improvement. I will each and every day retain new information and grow as an individual to provide great service. A registered nurse is the main focus of my schooling as of right now. A registered nurse is my main goal but anesthesiologist is also a field I am interested in. Any job in the medical field is needed all over the world.There is a high demand for people to work in the health care field. An anesthesiologist would be my second career goal. The salary according to career one stop in the state of Ohio from 2010 is between 129,000 to 127,000 dollars a year. (â€Å"Career One Stop,† n. d. , para. 2) Anesthesiologists are responsible for putting people under for surgeries. They check people’s blood types and determine the right am ount of fluid to give to make a person sleep during a surgery. This job is very important not only to the patient but also to the surgeon so they can successfully perform a surgery.Here are a few skills and abilities that are needed for this field: â€Å"Skills: Active Listening – Giving full attention to what other people are saying, taking time to understand the points being made, asking questions as appropriate, and not interrupting at inappropriate times. Critical Thinking – Using logic and reasoning to identify the strengths and weaknesses of alternative solutions, conclusions or approaches to problems. Monitoring – Monitoring/Assessing performance of yourself, other individuals, or organizations to make improvements or take corrective action.Reading Comprehension – Understanding written sentences and paragraphs in work related documents. Judgment and Decision Making – Considering the relative costs and benefits of potential actions to choose the most appropriate one. Science – Using scientific rules and methods to solve problems. Speaking – Talking to others to convey information effectively. Abilities: Problem Sensitivity – The ability to tell when something is wrong or is likely to go wrong. It does not involve solving the problem, only recognizing there is a problem.Oral Comprehension – The ability to listen to and understand information and ideas presented through spoken words and sentences. Deductive Reasoning – The ability to apply general rules to specific problems to produce answers that make sense. Inductive Reasoning – The ability to combine pieces of information to form general rules or conclusions (includes finding a relationship among seemingly unrelated events). Near Vision – The ability to see details at close range (within a few feet of the observer). †(â€Å"CareerOneStop,†n. d. , para. 3) Like a registered nurse there is always room to lear n new abilities and skills for the job.There will always be lifelong learning opportunities. Anesthesiologist draws me in because of the salary but a veterinarian would be the next field of interest. A veterinarian is a health care profession that deals with the health and well being of animals. You still need the same judgment in this field. You are responsible for the health of animals. They cannot speak for themselves for you have to be the voice for them. According to Career One Stop on average in the state of Ohio in 2010 a veterinarian makes between 53,000 to 120,000 dollars a year. (â€Å"CareerOneStop,† n. d, para. ) Animals are becoming more and more like children to people and their health is very important to people. Skills and abilities are endless in this field. Here are a few skills and abilities needed for this field: Skills: Science – Using scientific rules and methods to solve problems. Active Listening – Giving full attention to what other peop le are saying, taking time to understand the points being made, asking questions as appropriate, and not interrupting at inappropriate times. Critical Thinking – Using logic and reasoning to identify the strengths and weaknesses of alternative solutions, conclusions or approaches to problems.Speaking – Talking to others to convey information effectively. Judgment and Decision Making – Considering the relative costs and benefits of potential actions to choose the most appropriate one. Reading Comprehension – Understanding written sentences and paragraphs in work related documents. Abilities: Inductive Reasoning – The ability to combine pieces of information to form general rules or conclusions (includes finding a relationship among seemingly unrelated events). Oral Comprehension – The ability to listen to and understand information and ideas presented through spoken words and sentences.Oral Expression – The ability to communicate infor mation and ideas in speaking so others will understand. Problem Sensitivity – The ability to tell when something is wrong or is likely to go wrong. It does not involve solving the problem, only recognizing there is a problem. Deductive Reasoning – The ability to apply general rules to specific problems to produce answers that make sense. (â€Å"CareerOneStop,†n. d. ,para 4) Learning opportunities are endless in this field. New disease and sicknesses are being developed daily and there is always room for improvement. Becoming a veterinarian is the last field that interests me.After reviewing all of my interested career paths I have concluded that a registered nurse is my goal. Becoming a registered nurse will take a lot of hard work and dedication but it is the main career goal. I am pursing this field because of the salary, responsibilities and skills that come with the job. Helping others will give me a sense of worth. Though anesthesiologist and a veterinarian do interest me I will continue in the path I am headed in. According to Mayo school of Health Sciences, â€Å"Nurses work to promote health, prevent disease and help patients cope with illness.They are advocates and health educators for patients, families and communities†. (Mayo Clinic, n. d. , para. 1) I am a nurturing person and a nurse will allow me to display these skills. References Occupation Profile – America's Career InfoNet. (n. d. ). Welcome to America's Career InfoNet. Retrieved April 3, 2012, from http://www. careerinfonet. org/occ_rep. asp? next=occ_rep;Level=;optstatus=111111111;jobfam=29;id=1;nodeid=2;soccode=291141;stfips=39;x=0;y=0 Registered Nurse Career Overview. (n. d. ). Mayo Clinic. Retrieved April 3, 2012, from http://www. mayo. edu/mshs/rn-career. html

International Trade Is The Exchange Of Goods And Services...

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