N09/4/CHEMI/HPM/ENG/TZ0/XX+ 88096101 CHEMISTRY HIgHER lEvEl PaPER 1 Tuesday 3 November 2009 (afternoon) 1 hour INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. • The periodic table is provided for reference on page 2 of this examination paper. 8809-6101 16 pages © International Baccalaureate
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Chemistry Module Six: Thermochemistry and rate Study sheet for the test G.01: Thermo-chemistry I. Temperature and Thermal Energy Temperature is a measure of the average kinetic energy of the particles in a sample of matter. The greater the avg. kinetic energy of the particles in a sample of matter‚ the higher the temperature of that matter. Some temperature scales are Fahrenheit‚ Celsius and Kelvin. Thermal energy is the measure of the total kinetic energy in a sample. And Temperature
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Entropy: Entropy is a measure of the disorder of a system. Entropy comes from the second law of thermodynamics‚ which states that all systems tend to reach a state of equilibrium. The significance of entropy is that when a spontaneous change occurs in a system‚ it will always be found that if the total entropy change for everything involved is calculated‚ a positive value will be obtained. Simply‚ all spontaneous changes in an isolated chemical system occur with an increase in entropy. Like enthalpy
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Iodine-Clock Activation Energy * The plot of (ln k) vs. (1/T) for the iodine clock reaction should reveal a slope of about -6230. Thus‚ (-Ea/R) = -6230. Using an ideal gas constant of R = 8.314 J/K.mol gives Ea = 6800 * 8.314 = 51‚800 J/mol‚ or 51.8 kJ/mol. Read more: Activation Energy of the Iodine Clock Reaction | eHow.com
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Bio1. Explain the significance of the principle of competitive exclusion. ............................................................................................................................................... ............................................................................................................................................... .......................................................................................................................................
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Abstract The aim of this experiment is to determine the heat of combustion for naphthalene. This is the some basic bomb procedures. In this experiment‚ we us naphthalene as a fuel in bomb calorimeter which naphthalene powder is turned to pellet using pellet press. The fuel is burnt at constant volume condition in a high pressure container (the bomb). The whole bomb‚ pressurized with excess of oxygen. The mass of iron wire‚ ma =0.02g. The mass of naphthalene pellet with iron wire‚ mb =0.38g. The
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.C. is committed to supporting business and investing and has developed numerous valuable resources for business owners and investors at various stages in their endeavours. Learn about these resources and how you can make the most out of your opportunities. Business Management Thinking of starting a business but not sure where to stThe Ksp expression is A. Ksp = Sr2+ [ ]3 PO4 3− [ ]2 B. Ksp = 3Sr2+ [ ] 2PO4 3− [ ] C. Ksp = 3Sr2+ [ ]3 2PO4 3− [ ]2 D. Ksp = 3Sr2+ [ ]3 2PO4
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The Market for Gas Turbine Electrical Power Generation Product Code #F646 A Special Focused Market Segment Analysis by: Industrial & Marine Turbine Forecast - Gas & Steam Turbines Analysis 1 The Market for Gas Turbine Electrical Power Generation 2011 - 2020 Table of Contents Executive Summary .................................................................................................................................................2 Introduction.................................
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ECOLOGICAL PYRAMIDS ECOLOGICAL PYRAMIDS • If we arrange the organisms in a food chain according to their trophic levels‚ we often form a pyramid with a broad base representing primary produces & only a few individuals in the higher trophic level. • This pyramid arrangement is especially true if we look at the E content of an ecosystem. • Following the 2nd law of thermodynamics‚ less food E is available to the top trophic level than is available to the preceding level. • For example‚ it takes
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destructive to the environment. Extrusion is the process in manufacturing this type of bags. a.1 Energy The production of PLastics demands large quantities of both energy and raw materials. Two plastic bags require 990 kJ (kilojoules) of natural gas‚ 240 kJ of petroleum‚ and 160 kJ of coal (Institute for Lifecycle Environmental Assessment‚ 1990). Additionally‚ there are large amounts of energy used to acquire oil‚ such as the large‚ fuel-burning heavy machinery‚ and most of the electricity used in
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