11 Using Energy © 2010 Pearson Education‚ Inc. Slide 1 © 2010 Pearson Education‚ Inc. Slide 2 © 2010 Pearson Education‚ Inc. Slide 3 © 2010 Pearson Education‚ Inc. Slide 4 Reading Quiz 1. A machine uses 1000 J of electric energy to raise a heavy mass‚ increasing its potential energy by 300 J. What is the efficiency of this process? A. B. C. D. E. 100% 85% 70% 35% 30% © 2010 Pearson Education‚ Inc. Slide 5 Reading Quiz 2. When the temperature of an ideal
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References: 1) http://www.ehow.com/about_5103936_twostage-air-compressor.html 2) Yunus A. Cengel‚ Michael A. Boles‚ Thermodynamics: An Engineering Approach‚ 6th edition. McGraw-Hill 3) Obert‚ E. F. & Young‚ R. L. Elements of Thermodynamics and Heat Transfer. New York: McGraw-Hill. 4) Experiment Handout.
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Thermodynamics I Spring 1432/1433H (2011/2012H) Saturday‚ Wednesday 8:00am 10:00am & Monday 8:00am - 9:00am MEP 261 Class ZA Dr. Walid A. Aissa Associate Professor‚ Mech. Engg. Dept. Faculty of Engineering at Rabigh‚ KAU‚ KSA Chapter #10 December XX‚ 2011 Announcements: Dr. Walid’s e-mail and Office Hours walid_aniss@yahoo.com Office hours for Thermo 01 will be every Sunday and Tuesday from 9:00 – 12:00 am in Dr. Walid’s office (Room 5-213). Text book: Thermodynamics An Engineering Approach
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OBJECTIVE To determine the change of standard Gibbs free energy for the decomposition of sodium hydrogen carbonate (NaHCO3) from the change of standard enthalpy and the change of standard entropy. THEORY Free energy is a state function that expresses the spontaneity of a chemical process in term of enthalpy and entropy change of a system under conditions of constant temperature and volume (Hemholtz free energy) and constant temperature and pressure (Gibbs free energy). It is a quantity of non-pressure-and-volume
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Experiment 16: Heat conduction Introduction In this laboratory you will study heat flow across a temperature gradient. By comparing the temperature difference across one material to the temperature difference across a second material of known thermal conductivity‚ when both are conducting heat at a steady rate‚ you will be able to calculate the thermal conductivity of the first material. You will then compare the experimental value of the calculated thermal conductivity to the known value for that
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had to determine the heat exchanged when solid magnesium hydroxide is mixed with solid citric acid‚ using a coffee cup calorimeter. Given that citric acid is soluble in water is the property that makes this reaction possible. The first law of thermodynamics and Hess’s law are also present within this experiment. Knowing the difference between endothermic and exothermic reactions is also relevant. If the temperature goes down when energy is put in this means that the bonds are breaking. If the temperature
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The Efficiency of Heating Using a Flame Thermodynamics II Contents Introduction 2 Observations 2 Time/Temperature readings 2 Time/Temperature Plot 3 Calculations and Results 3 1) Enthalpy change of gas burned over the duration of the test 3 2) Heat transfer to the water in the kettle (Qw) 4 3) Heat transfer to the water which evaporates from the kettle (Qev) 4 4) Heat transfer to the kettle from initial to final state (Qk) 4 Find‚ as a fraction of 1‚ the values
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The Advanced Placement Examination in Chemistry Part II - Free Response Questions & Answers 1970 to 2007 Thermodynamics Teachers may reproduce this publication‚ in whole or in part‚ in limited print quantities for non-commercial‚ face-to-face teaching purposes. This permission does not apply to any third-party copyrights contained within this publication. Advanced Placement Examination in Chemistry. Questions copyright© 1970-2007 by the College Entrance
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graduated cylinder‚ * Conc. sulphuric acid (specific gravity 1.84‚ 98.5% H2SO4 )‚ conc. nitric acid‚ * 1 M sodium hydroxide‚ 0.1 M hydrochloric acid‚ methyl orange indicator. Introduction : Enthalpy is a measure of total energy of a thermodynamic system. It includes the internal energy of the system and the product of its volume multiplied by the pressure exerted on it by its surrounding. H = U + p*V Where‚ H = Enthalpy V = Volume p = Pressure U = Internal Energy The enthalpy
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calorimeter apparatus‚ Mesa Community College CHM152LL website‚ www.physci.mc.maricopa.edu/Chemistry/CHM152‚ accessed 1/11/2011. 3 Darrell D. Ebbing ‚ Steven D. Gammon‚ General Chemistry‚ 9th ed.‚ Houghton Mifflin‚ Boston‚ 2009‚ p. 426. 4 “Appendix C: Thermodynamic Quantities for Substances and Ions at 25°C” in Darrell D. Ebbing‚ Steven D. Gammon‚ General Chemistry‚ 9th ed.‚ Houghton Mifflin‚ Boston‚ 2009‚ p. A-10
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