N11/4/CHEMI/SP2/ENG/TZ0/XX 88116105 CHEMISTRY STandaRd lEvEl PaPER 2 Monday 7 November 2011 (afternoon) 1 hour 15 minutes INSTRUCTIONS TO CANDIDATES • • • • • Candidate session number 0 0 Examination code 8 8 1 1 – 6 1 0 5 Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Section A: answer all questions. Section B: answer one question. Write your answers in the boxes provided. 19 pages © International Baccalaureate Organization
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1. INTRODUCTION A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel‚ which is injected into the combustion chamber during the final stage of compression. Diesel engines have wide range of utilization for automobiles‚ locomotives & marines and co-generation systems. However‚ large problem is still related to undesirable emission. The six-stroke engine is a type of internal combustion engine based on the four-stroke
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CH3CH2CH2NH2 e) H2NCH2CH2NH2 8. Which of the following ionic compounds should have the highest melting point? a) LiBr b) MgO c) NaI d) CaS e) NaCl 9. Given the bond enthalpies N-H (389)‚ Cl-Cl (243)‚ N-Cl (201)‚ H-Cl (431) in kJ/mol‚ compute ΔH in kJ/mol for: NH3 + Cl2 NH2Cl+ HCl a) 0 b) -393 c) -110 d) +393 e) +71 10. Which of the following molecules contains both ionic and covalent bonds? a) C6H14 b) MgCl2 c) (NH4)2SO4 d) H2O 11. A polar solute is poured into a container
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of the reaction with respect to each reactant was calculated to be: x = 1 [I-]‚ y = 1 [BrO3-]‚ z = 2 [H+] by the method of initial rates. The average rate constant was determined to be 26.7 M-3s-1‚ and the activation energy was calculated to be 49.6 kJ/mol. Introduction The whole purpose of this experiment is to deal with the laws of chemical kinetics‚ and by doing the experiment‚ compare the experimental results with the theories and see if they were followed. From the kinetics studies‚ it is
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this on a graph. ENERGY CHANGES DURING A REACTION To find the bond energies in the molecule of the alcohol we have to look at the how much energy is in the separate bonds of the molecule. Below we have a table of bond energies. Bond Bond Energy (kj/mol) C - OH 402 C - H 435 C - C 347 H - O 464 C = O 805 If we draw out the structure of each molecule involved in the chemical reaction we can easily find out how much energy is in that molecule. STRUCTURE OF THE MOLECULES INVOLVED METHANOL
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.......................................................................................... [1] [Total 4 marks] 2. The figure below represents the transfer of energy through a woodland ecosystem. (a) Of the 800 000 kJ of energy which reaches the producers‚ only 10 000 kJ of energy is converted to growth in the producers. (i) Calculate the percentage of the energy reaching the producers that is converted to growth in the producers. Show your working. Answer = ..................
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AuE 817 – Alternative Power Sources Spring 2013 Dr. Pierluigi Pisu Hw #1 Due Jan 24th‚ 2013 @ 5pm Problem 1 (15 points) Consider a typical mid-size SUV. The table below summarizes some of the typical parameters associated with vehicle in that class: Table 1. Typical mid-size SUV vehicle parameters Parameters Value Notes 2.84 m2 Vehicle frontal area Af 7.1 m2 Vehicle side area Ac 0.39 Vehicle aerodynamic drag Cd coefficient 2.6 0.010+0.0028*(v/100) Rolling resistance Cr coefficient‚ smooth pavement
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Electron transport and oxidative phosphorylation 1. The mitochondrion Lec 8 A. Mitochondrial anatomy B. Mitochondrial transport systems 2. Electron transport A. Thermodynamics of electron transport B. The sequence of electron transport Lec 9 C. Complex I NADH Coenzyme Q Oxidoreductase D. Complex II succinate Coenzyme Q Oxidoreductase E. Complex III Coenzyme Q-Cytochrome c Oxidoreductase F. Complex IV Cytochrome c oxidase 3. Oxidative Phosphorylation A. The Chemiosmotic Theory
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p IB DIPLOMA PROGRAMME PROGRAMME DU DIPLÔME DU BI PROGRAMA DEL DIPLOMA DEL BI Chemistry Higher level and standard level Specimen paper 1s‚ 2s and 3s For first examinations in 2009 CONTENTS Chemistry higher level paper 1 specimen paper Chemistry higher level paper 1 specimen markscheme Chemistry higher level paper 2 specimen paper Chemistry higher level paper 2 specimen markscheme Chemistry higher level paper 3 specimen paper Chemistry higher level paper 3 specimen markscheme
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Name: Ana Cecilia Alcalá Bolio Registration: 2693441 Course title: Chemistry II Teacher’s name: Hugo Skyol Pliego Cortes Module: 1. Hydrocarbons in life. Activity: Homework 3 Date: January 30‚ 2013 Team: Doesn’t apply. Bibliography: Universidad TecMilenio. BlackBoard. Topic 3. http://bbsistema.tecmilenio.edu.mx/webapps/portal/frameset.jsp?tab_tab_group_id=_2_1&url=%2Fwebapps%2Fblackboard%2Fexecute%2Flauncher%3Ftype%3DCourse%26id%3D_109276_1%26url%3D Wikipedia.org. “Ethane” (2012)
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