Kull Key Chemistry 105 Practice Test 3 Spring 2007 Student: ________________________ The actual test will have 15 multiple choice‚ select 12 for grading‚ and 5 or 6 workout problems. There are no work-out problems here‚ bur the types of required computations are seen in the multiple choice problems here. I will place an updated equation sheet on the web by Wednesday morning‚ as well as post the answer key. 1 Who proposed a model that successfully explained the photoelectric effect? A
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84g/cm3 x 1kg/1000g) x (1.38kJkg-1K-1) x (28.0-33.0) = + 0.6348 kJ ∆Hᶿ = qp / n = 0.6348 kJ / (4.4318 g / 84.008 gmol-1) = 0.6348 kJ / 0.05275 mol = + 12.034 kJmol-1 b. Na2CO3 with H2SO4 Na2CO3 (s) + H2SO4 (aq) Na2SO4 (aq) +H2O (l) + CO2 (g) qp = mCp∆T = (50mL x 1cm3/mL x 1.84g/cm3 x 1kg/1000g) x (1.38kJkg-1K 1) x (35.5-34.0) = - 0.1904 kJ ∆Hᶿ = qp / n = 0.1904 kJ / (3.3222 g / 105.99 gmol-1) = 0.1904 kJ / 0.03134 mol = - 6.077 kJmol-1 ∆Hᶿ for the decomposition of NaHCO3
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DIVISION OF CHEMISTRY :MODULE: GENERAL CHEMISTRY (CHY2021) TUTORIAL # 2 DATE: September 2013 1. Define the following terms: mass number‚ atomic number and the atomic mass unit (amu). 2. With the help of The Periodic Table‚ complete the table below. Symbol Atomic # Proton # Neutron # # of Electrons Mass Number Charge Ar 19 31 17 18 35 20 18 3+ 40 3. In your own words‚ explain Thomson’s and Rutherford’s contribution to the atomic theory. Give sketches to substantiate your answer. 4. Explain
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TWS Chemistry 1013-231 Organic Chemistry I Name___________________________________ 2011 Exam#2 - Version 2 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Energy is __________ when bonds are formed and is __________ when bonds are broken; therefore‚ bond dissociation energies are always __________. A) consumed / released / endothermic B) consumed / released / isothermic C) released / consumed / endothermic D) consumed / released / exothermic
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Module No. 6 Energy Relationships in Chemical Reactions The Nature of Energy and Types of Energy Energy – is the capacity to do work or to transfer heats. Forms of Energy 1. Kinetic energy 2. Radiant energy 3. Thermal energy 4. Chemical energy 5. Potential energy Energy Changes in Chemical Reactions Heat – is the transfer of thermal energy between two bodies that are at different temperature. Thermochemistry – is the study of heat
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Write the electronic configuration in box notation of chromium and copper. Suggest reasons for the apparently anomalous arrangement of electrons in their atoms. (Total 4 Marks) 4. The following table shows the first three ionization energies (in kJ mol-1) of elements in the SAME group of the Periodic Table. Element A B C D E (a) (b) Hi1 383 409 425 502 527 Hi2 2437 2667 3065 4568 7314 Hi3 3376 3881 4438 6929 11820 In which group of the Periodic Table should
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Chemistry 12 Review Sheet on Unit 2 Chemical Equilibrium 1. What two things are equal at equilibrium? _________________________________ and ________________________________ 2. Consider the following potential energy diagram: a) Which reaction‚ forward or reverse‚ will be affected more by an increase in temperature? _______________________________________ b) Write a thermochemical equation for the forward reaction using the numerical value for the heat. Answer _______________________________________________________________
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EXPERIMENT 3 MARCET BOILER 1.0. OBJECTIVE • To obtain a relationship between the pressure and temperature of saturated steam‚ in equilibrium with water‚ at all pressure between atmospheric and 10 bar (150 lb/in2). • To compare between calculated values from experiment data to the data obtained from steam table for vfg and hfg . 2.0. THEORY Thermodynamics is defined as a study related to the transfer of heat and work between a system and the surrounding‚ undergoing
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patterns and challenges for the industry. For objectivity‚ and assessing consumer and market sentiments‚ two case analyses have also been presented from various major stores in Mumbai. Submitted to: Prof. Pramod Shetty Date: 23rd August 2010 1 KJ Somaiya Institute of Management Studies & Research Toy Industry : Present and the Future 2010 ACKNOWLEDGMEN T At the very outset‚ we would like to thank the management of ‘Hamley’s’‚ ‘Landmark Store’‚ ‘Mother and Me Store’ for helping us with
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5 Gas Cycles Heat engine or thermal engine is a closed system (no mass crosses its boundaries)that exchanges only heat and work with its surrounding and that operates in cycles. Elements of a thermodynamic heat engine with a fluid as the working substance: 1. A working substance‚ matter that receives heat‚ rejects heat‚ and does work; 2. A source of heat (also called a hot body‚ a heat reservoir‚ or just source)‚ from which the working substance receives heat; 3. A heat
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