SHOW YOUR WORK 1) Of the molecules below‚ the bond in __________ is the least polar. A) HBr B) HI C) HCl D) HF E) H2 2) Ethanol (C2H5OH) melts at -114°C. The enthalpy of fusion is 5.02 kJ/mol. The heat capacity of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K‚ respectively. How much heat (kJ) is needed to convert 25.0 g of solid ethanol at -135°C to liquid ethanol at -50°C? A) 207.3 B) -12.7 C) 6.91 D) 4192 E) 9.21 3) Which equation correctly represents the first ionization
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Complete Solutions Manual GENERAL CHEMISTRY NINTH EDITION Ebbing/Gammon David Bookin Mt. San Jacinto College Darrell D. Ebbing Wayne State University‚ Emeritus Steven D. Gammon Western Washington University HOUGHTON MIFFLIN COMPANY BOSTON NEW YORK Vice President and Executive Publisher: George Hoffman Vice President and Publisher: Charles Hartford Senior Marketing Manager: Laura McGinn Development Editor: Kate Heinle Assistant Editor: Amy Galvin Editorial Assistant: Chip
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Prof. Dr. Suat Ungan Fd.E. 425 Food Engineering Design Coordinator Middle East Technical University Food Engineering Department Ankara 06531 November 25‚ 2011 Dear Mr. Ungan‚ Please accept the accompanying Work Term Report‚ aimed designing a toasting oven in order to produce corn flakes. In the designed system 10 tons corn flakes per day is produced. After some processes‚ corn flakes enters the roasting oven at 20% humidity and exits at 4%humidity.The roasting oven can operate at (±10
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Measuring the enthalpy change of vaporisation of water You should attempt this part of the activity even if you have not seen the demonstration of the practical. 1. Calculate a value for ∆Hvap for water in KJ mol-1 using the data from the demonstration. Also‚ calculate ∆Hvap from the following data gathered by a student; 8100 J were needed to distil 2.95g of water. a) Explain why the boiling tube was surrounded with expanded polystyrene (or other similar insulation)‚ but the condenser was left
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constant pressure‚ the heat of a reaction is defined as the enthalpy change for the reaction (ΔH). Since most reactions occur under constant atmospheric pressure‚ the heat of a reaction is equal to ΔH‚ which is generally reported in units of kilojoules (kJ) per mole of the reactants and products as shown in the balanced thermochemical equation. For example‚ the reaction between hydrogen gas and oxygen gas to
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Trends in Ionization energy of Group 1 elements and Their Analysis 1) As we move down Group 1 (Elements are H‚ Li‚ Na‚ K‚ Rb‚ Cs‚ Fr) the general trend in first ionization energies is that they decrease as we move down the group from H to Cs. Francium is an exception. 2) As we move down Group 1‚ Ionization energies decrease because a) Distance between the Nucleus and the valence electrons increases with every new period; a new electron shell is added. This increases the atomic size which makes
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H°(kJ) Sublimation of potassium K(s) → K(g) 89 Ionization energy of potassium K(g) → K+ (g) + e- 418 Bond energy of chlorine Cl2(g) → 2 Cl(g) 244 Electron affinity of chlorine Cl(g) + e- → Cl- (g) -349 Lattice energy of potassium chloride K+ (g) + Cl-(g) → KCl(s) ? Heat of formation of potassium chloride K(s) + ½ Cl2(g) → KCl(s) -437 a) -1537 kJ b) -663 kJ e) -717 kJ c) -157 kJ d) -839 kJ 8. Choose
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Regarding the TPR results: ZnFe2O4 did not show any sign of α-oxygen related to surface‚ which is looser than β or γ-oxygen related to the deeper oxygen of crystal structure. However‚ reducibility of lattice oxygen depends on the crystal size of the metal oxides; the smaller particles results shortening the distance for oxygen migration from the bulk to the surface. In summary‚ the characterizations of ZnFe2O4 reveal that the preparation protocol allowed ZnFe2O4 to have a smaller particle size and
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Aim To investigate the effect of molar mass on the molar heat of combustion of adjacent members of a homologous alcohol series. Introduction Chemists refer to the energy stored in a substance as the heat content or enthalpy of the substance. The heat of reaction is determined by the difference in the enthalpy between the reactants and products. The molar heat of combustion of a substance is the quantity of heat liberated when one mole of that substance is burnt completely in air. In the case
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SOLUTION MANUAL CHAPTER 7 Borgnakke and Sonntag CONTENT CHAPTER 7 SUBSECTION In-Text concept questions Concept problems Heat engines and refrigerators Second law and processes Carnot cycles and absolute temperature Finite ∆T heat transfer Ideal gas Carnot cycles review problems PROB NO. a-g 1-14 15-36 37-43 44-77 78-91 92-95 96-113 Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis for testing or instructional purposes
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