| Journal Articles: 39 results |
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Teaching Avogadro's Hypothesis and Helping Students to See the World Differently Brett Criswell This article uses a model from educational psychologyChi's theory of ontological misclassificationto explain the source of students' difficulties in understanding Avogadro's hypothesis and provide a method to successfully teach this fundamental concept. Criswell, Brett. J. Chem. Educ. 2008, 85, 1372.
Atomic Properties / Structure |
Gases
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Does the Addition of Inert Gases at Constant Volume and Temperature Affect Chemical Equilibrium? João C. M. Paiva, Jorge Gonçalves, and Susana Fonseca This article examines three approaches, leading to different conclusions, for answering the question "Does the addition of inert gases at constant volume and temperature modify the state of equilibrium?" Paiva, João C. M.; Gonçalves, Jorge; Fonseca, Susana. J. Chem. Educ. 2008, 85, 1133.
Equilibrium |
Gases |
Thermodynamics
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Exception to the Le Châtelier Principle Thomas R. Herrinton Disagreement regarding an apparent exception to the Le Chtelier principle involving the effects of nonideality on the direction in which the ammonia synthesis reaction shifts upon addition of infinitesimal and finite quantities of nitrogen at constant pressure and temperature. Herrinton, Thomas R. J. Chem. Educ. 2007, 84, 1427.
Equilibrium |
Gases
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Exception to the Le Châtelier Principle Thomas R. Herrinton Disagreement regarding an apparent exception to the Le Chatelier principle involving the effects of nonideality on the direction in which the ammonia synthesis reaction shifts upon addition of infinitesimal and finite quantities of nitrogen at constant pressure and temperature. Herrinton, Thomas R. J. Chem. Educ. 2007, 84, 1427.
Equilibrium |
Gases
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Using Dalton's Law of Partial Pressures To Determine the Vapor Pressure of a Volatile Liquid Fred R. Hilgeman, Gary Bertrand, and Brent Wilson This experiment, designed for a general chemistry laboratory, illustrates the use of Dalton's law of partial pressures to determine the vapor pressure of a volatile liquid. Hilgeman, Fred R.; Bertrand, Gary; Wilson, Brent. J. Chem. Educ. 2007, 84, 469.
Gases |
Liquids |
Physical Properties |
Solutions / Solvents
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Job's Analysis of the Range of the "Dalton Syringe Rocket" Natalie Barto, Brandon Henrie, and Ed Vitz An apparatus for safely igniting fuel gas/oxygen mixtures in a syringe and measuring the distance that the syringe is propelled is presented. The distance (range) is analyzed by the method of continuous variation (Job's Method) to determine the stoichiometry of the reaction. Barto, Natalie; Henrie, Brandon; Vitz, Ed. J. Chem. Educ. 2006, 83, 1505.
Gases |
Oxidation / Reduction |
Thermodynamics |
Stoichiometry
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Achieving Chemical Equilibrium: The Role of Imposed Conditions in the Ammonia Formation Reaction Joel Tellinghuisen The conditions under which chemical reactions occur determine which thermodynamic functions are minimized or maximized. This point is illustrated for the formation of ammonia in the ideal gas approximation using a numerical exercise. Tellinghuisen, Joel. J. Chem. Educ. 2006, 83, 1090.
Gases |
Equilibrium |
Thermodynamics
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Gas Permeability of Polymers Jee-Yon Lee Undergraduate students can learn what causes the helium-inflated balloon to fall in a few days through the proposed experiment. Lee, Jee-Yon. J. Chem. Educ. 2005, 82, 1472.
Gases |
Transport Properties
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Gas Permeability of Polymers Bruno Lunelli The recent article, Applying Chemical Potential and Partial Pressure Concepts To Understand the Spontaneous Mixing of Helium and Air in a Helium-Inflated Balloon, proposes a model of permeation untenable and in contradiction with correct statements present in the same text and consequently does not consider the material of which the investigated balloons are made. Lunelli, Bruno. J. Chem. Educ. 2005, 82, 1471.
Gases |
Transport Properties
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Gas Permeability of Polymers Bruno Lunelli By studying a number of soft drinks with color but with or without phosphoric acid, the authors have determined that the required 20-fold dilution required in the Determination of Phosphorus in Cola Drinks is not to dilute the color but merely to place the sample within the calibration range of the analysis. Lunelli, Bruno. J. Chem. Educ. 2005, 82, 1471.
UV-Vis Spectroscopy |
Instrumental Methods |
Gases |
Transport Properties
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A Note on Dalton's Law: Myths, Facts, and Implementation Ronald W. Missen and William R. Smith The treatment of Dalton's law for gas mixtures commonly includes the improper designation "Dalton's law of partial pressures", rather than the correct "Dalton's law of additivity of (pure component) pressures". It also identifies the pure component pressure as the partial pressure, although these are only numerically equal for a mixture of ideal gases. The situation is clarified by examination of an appropriate statement of the law and definitions, eventually in operational form with reference to mixtures of nonideal gases. Missen, Ronald Wi.; Smith, William R. J. Chem. Educ. 2005, 82, 1197.
Thermodynamics |
Gases
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Applying Chemical Potential and Partial Pressure Concepts To Understand the Spontaneous Mixing of Helium and Air in a Helium-Inflated Balloon Jee-Yon Lee, Hee-Soo Yoo, Jong Sook Park, Kwang-Jin Hwang, and Jin Seog Kim In developing this laboratory, our initial motivation for the analysis of gases in a balloon was to answer simple and basic questions, such as, Why does a helium-charged balloon left in the air always drop in a few days? Is leakage of helium the only cause of the drop? What is the composition of the gas in the balloon when it falls after deflation? Students were intrigued by these questions, too, as they analyzed the variation over time in the composition in a balloon inflated with helium. Using the concepts of partial pressure and chemical potential, the laboratory experiment described effectively investigates the diffusion process and the behavior of gas molecules for teaching these concepts in general and physical chemistry. Lee, Jee-Yon; Yoo, Hee-Soo; Park, Jong Sook; Hwang, Kwang-Jin; Kim, Jin Seog. J. Chem. Educ. 2005, 82, 288.
Transport Properties |
Gases |
Mass Spectrometry |
Quantitative Analysis
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Chemistry and Song: A Novel Way To Educate and Entertain Cory C. Pye In this article, a novel way of teaching chemistry is presented that uses contemporary music and chemical lyrics to educate. Pye, Cory C. J. Chem. Educ. 2004, 81, 507.
Gases
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Carbon Dioxide Flooding: A Classroom Case Study Derived from Surgical Practice Robert C. Kerber The surgical opening in open-heart surgery is often flooded with carbon dioxide gas to avoid air embolisms when the heart is closed and restarted. This practice can be used in chemistry courses to illustrate concepts of gas density, solubility, and acidbase equilibria, including buffering. Kerber, Robert C. . J. Chem. Educ. 2003, 80, 1437.
Acids / Bases |
Aqueous Solution Chemistry |
Gases |
Medicinal Chemistry |
Nonmajor Courses |
Applications of Chemistry
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On Concepts of Partial Volume and Law of Partial Volume (re J. Chem. Educ. 2001, 78, 238-240) Myung-Hoon Kim Supplementing the law of partial pressures with a law of partial volumes. Kim, Myung-Hoon. J. Chem. Educ. 2001, 78, 1594.
Gases |
Chemometrics |
Physical Properties
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On Concepts of Partial Volume and Law of Partial Volume (re J. Chem. Educ. 2001, 78, 238-240) David W. Miller Supplementing the law of partial pressures with a law of partial volumes. Miller, David W. J. Chem. Educ. 2001, 78, 1594.
Gases |
Chemometrics |
Physical Properties
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On the Importance of Ideality Rubin Battino, Scott E. Wood, and Arthur G. Williamson Analysis of the utility of ideality in gaseous phenomena, solutions, and the thermodynamic concept of reversibility. Battino, Rubin; Wood, Scott E.; Williamson, Arthur G. J. Chem. Educ. 2001, 78, 1364.
Thermodynamics |
Gases |
Solutions / Solvents
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An Alcohol Rocket Car--A Variation on the "Whoosh Bottle" Theme Dean J. Campbell Burning methanol in a wheeled milk jug. Campbell, Dean J. J. Chem. Educ. 2001, 78, 910.
Gases |
Thermodynamics
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A Simple Laboratory Experiment for the Determination of Absolute Zero Myung-Hoon Kim, Michelle Song Kim, and Suw-Young Ly A novel method that employs a remarkably simple and inexpensive apparatus and is based on the extrapolation of the volume of a given amount of dry air to zero volume after a volume of air trapped inside a 10-mL graduated cylinder is measured at various temperatures. Kim, Myung-Hoon; Kim, Michelle Song; Ly, Suw-Young. J. Chem. Educ. 2001, 78, 238.
Gases |
Physical Properties |
Chemometrics
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A New Approach to Teaching Introductory Science: The Gas Module Pamela Mills, William V. Sweeney, Robert Marino, and Sandra Clarkson A lecture/laboratory module about the behavior of gases that is designed to expose students to the process of scientific discovery, not to teach the gas laws per se. The topic of gases is only the medium used to illustrate other important aspects of physical science: how to process experimental data and reduce it to symbolic mathematical relationships, how to evaluate the reliability of experimental data, and how to view the relationship between experimental data and scientific models. Mills, Pamela A.; Sweeney, William V.; Marino, Robert; Clarkson, Sandra. J. Chem. Educ. 2000, 77, 1161.
Gases
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Letters Points out that solid NaHSO3 does not exist. Tudela, David. J. Chem. Educ. 2000, 77, 830.
Gases |
Oxidation / Reduction |
Carbohydrates
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Formation and Dimerization of NO2 A General Chemistry Experiment April D. Hennis, C. Scott Highberger, and Serge Schreiner* A general chemistry experiment which illustrates Gay-Lussac's law of combining volumes. Students are able to determine the partial pressures and equilibrium constant for the formation and dimerization of NO2. The experiment readily provides students with data that can be manipulated with a common spreadsheet. Hennis, April D.; Highberger, C. Scott; Schreiner, Serge. J. Chem. Educ. 1997, 74, 1340.
Gases |
Equilibrium |
Quantitative Analysis |
Stoichiometry
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Simple analogies in general chemistry. McCullough, Thomas. Great Plains Indians and Dalton's Law; bullets, BB's, and the photoelectric effect; and high velocity bullets and high frequency light. McCullough, Thomas. J. Chem. Educ. 1992, 69, 543.
Gases |
Photochemistry
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Does a one-molecule gas obey Boyle's law? Rhodes, Gail Because the kinetic molecular theory provides a plausible explanation for the lawful behavior of gases, it should be treated in enough depth to show students that the theory accounts for all of the important aspects of ideal gas behavior. Rhodes, Gail J. Chem. Educ. 1992, 69, 16.
Gases |
Kinetic-Molecular Theory
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Why teach the gas laws? Davenport, Derek A. Justification for teaching the gas laws. Davenport, Derek A. J. Chem. Educ. 1985, 62, 505.
Gases |
Stoichiometry
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Why do we teach gas laws? Roe, Robert, Jr. Justification for teaching the gas laws. Roe, Robert, Jr. J. Chem. Educ. 1985, 62, 505.
Gases |
Kinetic-Molecular Theory
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An effective demonstration of some properties of real vapors Metsger, D. Scott The apparatus described in this article has been found by the authors to be the most effective in vividly illustrating the behavior of a nearly ideal gas to first year chemistry students. Metsger, D. Scott J. Chem. Educ. 1983, 60, 67.
Laboratory Equipment / Apparatus |
Gases |
Physical Properties |
Solids
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Gases and their behavior Schmuckler, Joseph S.
Schmuckler, Joseph S. J. Chem. Educ. 1980, 57, 885.
Gases
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Bicarbonate in Alka-Seltzer: A general chemistry experiment Peck, Larry; Irgolic, Kurt; O'Connor, Rod Determining the percentage bicarbonate ion by mass in Alka-Seltzer. Peck, Larry; Irgolic, Kurt; O'Connor, Rod J. Chem. Educ. 1980, 57, 517.
Quantitative Analysis |
Gases |
Stoichiometry |
Acids / Bases
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Participatory lecture demonstrations Battino, Rubin Examples of participatory lecture demonstrations in chromatography, chemical kinetics, balancing equations, the gas laws, the kinetic-molecular theory, Henry's law, electronic energy levels in atoms, translational, vibrational, and rotational energies of molecules, and organic chemistry. Battino, Rubin J. Chem. Educ. 1979, 56, 39.
Chromatography |
Kinetic-Molecular Theory |
Kinetics |
Stoichiometry |
Gases |
Atomic Properties / Structure |
Molecular Properties / Structure
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Questions [and] Answers Campbell, J. A. 188-192. Five biochemistry related questions and their answers. Campbell, J. A. J. Chem. Educ. 1975, 52, 390.
Enrichment / Review Materials |
Nuclear / Radiochemistry |
Chromatography |
Gases |
Nutrition
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A Dalton's law experiment for students in the health sciences Feigl, Dorothy M. The number of students who take an introductory chemistry course in preparation for the health sciences is increasing. This note is an illustration of Dalton's law of partial pressures adapted to demonstrate the ability of the lungs to effect the removal of excess dioxide from the body. Feigl, Dorothy M. J. Chem. Educ. 1974, 51, 273.
Gases |
Biophysical Chemistry
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Prolonging death (in apples) Plumb, Robert C. Using controlled atmosphere storage to prolong the freshness of vegetables and fruits after they have been harvested. Plumb, Robert C. J. Chem. Educ. 1970, 47, 518.
Equilibrium |
Kinetics |
Agricultural Chemistry |
Applications of Chemistry |
Gases
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Sealed tube experiments Campbell, J. A. Lists and briefly describes a large set of "sealed tube experiments," each of which requires less than five minutes to set-up and clean-up, requires less than five minutes to run, provides dramatic results observable by a large class, and illustrates important chemical concepts. Campbell, J. A. J. Chem. Educ. 1970, 47, 273.
Thermodynamics |
Crystals / Crystallography |
Solids |
Liquids |
Gases |
Rate Law |
Equilibrium
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Baby bottles and elementary chemistry Davenport, D. A. Presents several experiments that rely on baby bottles, including Charles' Law expansion, vapor pressure of volatile liquids, molecular weights of volatile liquids, and closed-atmosphere experiments. Davenport, D. A. J. Chem. Educ. 1969, 46, 878.
Laboratory Equipment / Apparatus |
Laboratory Management |
Gases |
Liquids |
Oxidation / Reduction
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An inexpensive vacuum and gas handling system for the freshman laboratory Zuehlke, R. W.; Cartier, P. G. Presents an inexpensive vacuum and gas handling system for the freshman laboratory. Zuehlke, R. W.; Cartier, P. G. J. Chem. Educ. 1969, 46, 874.
Laboratory Equipment / Apparatus |
Laboratory Management |
Gases
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The relationship between Avogadro's Principle and the Law of Gay-Lussac Feifer, Nathan Teaching Avogadro's Principle as an explanation of the phenomena described by Gay-Lussac's Law gives the instructor an opportunity to stress some of the basic assumptions in chemistry and to highlight the logic implicit in Avogadro's reasoning. Feifer, Nathan J. Chem. Educ. 1966, 43, 411.
Stoichiometry |
Gases
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Hypodermic syringes in quantitative elementary chemistry experiments. Part 2. General chemistry experiments Davenport, Derek A.; Saba, Afif N. Presents a variety of experiments that make use of hypodermic syringes in quantitative elementary chemistry. Davenport, Derek A.; Saba, Afif N. J. Chem. Educ. 1962, 39, 617.
Laboratory Equipment / Apparatus |
Gases |
Liquids |
Reactions |
Equilibrium |
Stoichiometry
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Dalton's law of partial pressures Dutton, Frederic B. Demonstrates that breaking a sealed ampule of ether in a closed system increases the pressure inside that system. Dutton, Frederic B. J. Chem. Educ. 1961, 38, A545.
Gases |
Ethers
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