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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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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Thermochemistry Lab Hypothesis We predict that two different physical changes (dissolving of a chemical substance in water) will produce energy changes; one exothermic and one endothermic. We predict that the temperature change will be affected by the change in system (open vs. closed) will be as follows: the temperature change in the closed system will be greater than that of the open system. Materials Refer to attached sheet Method Refer to attached sheet Observations Substance Added
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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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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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1 106 M-2 and a G° of -34.2 kJ/mol. If the concentrations of A‚ B‚ and C are all 1.0 mM and the temperature is 25 °C‚ a. b. c. d. e. the G for the reaction is negative and the reaction will proceed from left to right. the G for the reaction is positive and the reaction will proceed from right to left. the G for the reaction is zero and the reaction is at equilibrium. the G = G° and lnQ = 0. The G = lnQ and G° = 0. 4. For the reaction A B‚ G°’ = –60 kJ/mol. The reaction is started with
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General Issues: As with most FRQs the biggest issues were typically – - lack of enough outside info - time management issues and lack of development‚ - failure to completely focus on the prompt and keeping your evidence in the context of developing a clear argument that clearly answers the question. 2006 B: For whom and to what extent was the American West a land of opportunity from 1865 to 1890? For Whom? Homesteaders via 1862 Homestead Act Farmers Miners and prospectors Loggers Buffalo
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force called hydrogen bonding. This bonding is then replaced by ion-dipole when salt is dissolved in the water which is a weaker intermolecular force compared to hydrogen bonding. "Generally speaking‚ Hydrogen bonding is stronger (20-40 KJ/mol) than ion-dipole (10-20 KJ/mol)" ("Chemicalforums") . The water is then not held together as tightly and less force is needed to separate one drop from the main body of water. It would therefore be expected that the volume of the drop would be less as the gravitational
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