From the results recorded it was identified that activity A and C had exothermic reactions‚ whilst activity B had an endothermic reaction. Each of the activities had initially begun with 23.4/8/9oC‚ however‚ within one minute of adding the 2nd reactants‚ the results began showing‚ as seen from the graph. Activity A and C had risen in temperature‚ with A gaining 4oC and in total of 2 minutes having the temperature of 27.9oC along with C increasing by 2.2oC and within 2 minutes of the experiment having
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Reaction Essay on “Central Park Jogger” On April 19‚ 1989‚ Trisha Meili‚ an investment banker was found severely beaten at 1:30am. She was raped and cut so severely that she loss almost 70 percent of her blood. Five young boys were convicted of the rape. Although the young boys were recorded on video tape confessing‚ it turned out that they weren’t responsible for the rape at all. Interrogations took place during the process in which the young men were on trail‚ but there is no actual way that
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RATE OF REACTIONS. The reaction rate (rate of reaction) or speed of reaction for a reactant or product in a particular reaction is intuitively defined as how fast or slow a reaction takes place. For example‚ the oxidative rusting of iron under the atmosphere is a slow reaction that can take many years‚ but the combustion of cellulose in a fire is a reaction that takes place in fractions of a second (right). Chemical kinetics is the part of physical chemistry that studies reaction rates. The concepts
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Chapter 1 Chemical Reactions and Equations Q.1. Why should magnesium ribbon be cleaned before burning in air ? Ans: Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly. Q.2. Write the balanced
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The Effect of Distractions on Reaction Time Purpose: The purpose of this laboratory is to calculate your reaction times and design a procedure to evaluate the effect of reasonable distraction on reaction times. Introduction: Distractions are a part of everyday life‚ but they can become fatal while driving a car. A distraction can be defined as a something that renders a person incapable of behaving or reacting in a normal matter. Such distractions include the use of a cell phone
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Chemical Reactions What is a Chemical Reaction? Types of Chemical Reactions Redox Reactions Nonredox Reactions Classifying Reactions What is a Chemical Reaction? A chemical reaction is a process in which the identity of at least one substance changes. A chemical equation represents the total chemical change that occurs in a chemical reaction using symbols and chemical formulas for the substances involved. Reactants are the substances that are changed and products are the substances that are
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High School Students’ Conceptions about Energy in Chemical Reactions (focusing only in exothermic and endothermic reactions). Aim The aim of this study is to investigate students’ understanding of the energy concept in chemical reactions particularly in endothermic-exothermic reactions. Both qualitative and quantitative methodology was used for this investigation. A twenty-item multiple choice test was developed about the topic to measure the students’ understandings. This concept test was
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endothermic reaction happened everywhere around us. Basically exothermic and endothermic reaction is transfer energy to the surroundings and take in energy from the surroundings (BBC GCSE bitesize). If the reaction forward ，then is exothermic.If the reaction is the backwards ‚then is endothermic. When a reaction take place‚ the energy started to transfer from different object to the surroundings or take away energy from the surroundings. When temperature started to change. Exothermic Reaction An exothermic
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“Salvation” by Langston Hughes “Who Will Light the Incense When Mother’s Gone?” By Andrew Lam Nonfiction Reaction University of Phoenix ENG/125 Jill Greene Nonfiction Reaction “Salvation” by Langston Hughes Langston Hughes‚ author of the nonfiction short story “Salvation‚” was born James Mercer Langston Hughes on February 1‚ 1902 to Carrie and James Hughes in Joplin Missouri (New World Encyclopedia‚ 2008). Langston Hughes was among the principle figures of the Harlem Renaissance. He is
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Chemical Reactions Chemical reactions happen in almost everything around us. Reactions are very important in everyday life‚ and science. Chemical reactions are the changing of substances to other substances by the breaking of bonds in reactants and the formation of new bonds in products. There are different types of chemical reactions such as combination reaction‚ decomposition reaction‚ single-replacement reaction‚ double-replacement reaction‚ and combustion reaction. Combination
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