| Journal Articles: 36 results |
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Enthalpy of Vaporization and Vapor Pressures: An Inexpensive Apparatus Rubin Battino, David A. Dolson, Michael R. Hall, and Trevor M. Letcher
Describes an inexpensive apparatus for the determination of the vapor pressure of a liquid as a function of temperature for the purpose of calculating enthalpy changes of vaporization. Also described are a simple air thermostat and an inexpensive temperature controller based on an integrated temperature sensor.
Battino, Rubin; Dolson, David A.; Hall, Michael R.; Letcher, Trevor M. J. Chem. Educ. 2007, 84, 822.
Gases |
Laboratory Equipment / Apparatus |
Lipids |
Phenols |
Physical Properties |
Thermodynamics |
Liquids |
Phases / Phase Transitions / Diagrams
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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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An Inquiry-Based Chemistry Laboratory Promoting Student Discovery of Gas Laws A. M. R. P. Bopegedera
This article describes a laboratory in which students discover the gas laws using Vernier sensors and Microsoft Excel.
Bopegedera, A. M. R. P. J. Chem. Educ. 2007, 84, 465.
Gases |
Instrumental Methods |
Physical Properties
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Cp/Cv Ratios Measured by the Sound Velocity Method Using Calculator-Based Laboratory Technology Mario Branca and Isabella Soletta
The values ? = Cp /Cv (heat capacity at a constant pressure / heat capacity at constant volume) for air, oxygen, nitrogen, argon, and carbon dioxide were determined by measuring the velocity of sound through these gases at room temperature using Calculator-Based Laboratory Technology.
Branca, Mario; Soletta, Isabella. J. Chem. Educ. 2007, 84, 462.
Gases |
Thermodynamics |
Physical Properties
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Some Insights Regarding a Popular Introductory Gas Law Experiment Ed DePierro and Fred Garafalo
This paper alerts readers to a potential source of error in one approach to the Dumas method as it is often practiced in introductory chemistry laboratories. The room-temperature vapor pressures of volatile compounds that might be considered as unknowns for the experiment lead to determined molar masses that are too low. The greater the vapor pressure of the compound, the lower the determined molar mass will be, when compared to the accepted value.
DePierro, Ed; Garafalo, Fred. J. Chem. Educ. 2005, 82, 1194.
Gases |
Laboratory Equipment / Apparatus |
Phases / Phase Transitions / Diagrams |
Physical Properties
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On the Buoyancy of a Helium-Filled Balloon John E. Harriman
It is shown by expansion of the exponential in the barometric formula that the forces due to pressure acting on a balloon are of the form (PV/RT)Mg and that results agree with those suggested by Archimedes principle. Einstein's equivalence principal provides an answer to what balloons will do in an accelerated car.
Harriman, John E. J. Chem. Educ. 2005, 82, 246.
Atmospheric Chemistry |
Gases |
Kinetic-Molecular Theory |
Physical Properties
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Bringing History to the Classroom: Spoofs about Problems in Obtaining Research Grants Sidney Toby
This article is a spoof on the History of Science and consists of four skits depicting the difficulties famous men and women in science might have had in fictional interviews while seeking funding for their research.
Toby, Sidney. J. Chem. Educ. 2004, 81, 503.
Gases |
Physical Properties |
Nuclear / Radiochemistry |
Women in Chemistry |
Administrative Issues
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Why Does a Helium-Filled Balloon "Rise"? Richard W. Ramette
The article is a lighthearted, conversational exploration of the microscopic basis for Archimedes principle. The principle is discussed in terms of molecular collisions and density gradients in a gravitational field.
Ramette, Richard W. J. Chem. Educ. 2003, 80, 1149.
Atmospheric Chemistry |
Gases |
Kinetic-Molecular Theory |
Physical Properties
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Unknown Gases: Student-Designed Experiments in the Introductory Laboratory John Hanson and Tim Hoyt
Investigation in which students must determine the identity of three unknown gases by developing their own tests.
Hanson, John; Hoyt, Tim. J. Chem. Educ. 2002, 79, 845.
Gases |
Qualitative Analysis |
Physical Properties
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A Simple Experiment for the Determination of Molecular Weights of Gases Lighter Than Air Van T. Lieu and Gene E. Kalbus
A simple method for the determination of molecular weights of gases lighter than air.
Lieu, Van T.; Kalbus, Gene E. J. Chem. Educ. 2002, 79, 473.
Gases |
Molecular Properties / Structure |
Physical Properties
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Sink or Swim: The Cartesian Diver K. David Pinkerton
Cartesian divers are a quick and simple way to illustrate relationships among pressure, volume, temperature, and buoyancy. The Activity could be used in connection with the concepts of gases and liquids and discussions of Boyle's, Charles's, and the ideal gas laws.
Pinkerton, K. David. J. Chem. Educ. 2001, 78, 200A.
Gases |
Physical Properties
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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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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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JCE Classroom Activity: Out of "Thin Air": Exploring Phase Changes John J. Vollmer
This Activity illustrates sublimation/deposition with para-dichlorobenzene (mothballs) and evaporation/condensation with water.
Vollmer, John J. J. Chem. Educ. 2000, 77, 488A.
Phases / Phase Transitions / Diagrams |
Crystals / Crystallography |
Physical Properties |
Solids |
Gases
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Experimentally Determining the Molar Mass of Carbon Dioxide Using a Mylar Balloon Barbara Albers Jackson and David J. Crouse
The molar mass of carbon dioxide was experimentally determined using a Mylar balloon. Mylar balloons are lightweight, have a fixed definite volume, and require minimal additional pressure for inflation. Using the Ideal Gas Equation, the number of moles of air in the balloon was calculated.
Jackson, Barbara Albers; Crouse, David J. J. Chem. Educ. 1998, 75, 997.
Gases |
Physical Properties
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Notes on Vapor Pressure Equilibria Measurements Albert G. Krieger, John W. Henderson
Freshman students at our institution use manometers and 24/40 ground-glass distillation apparatus (abandoned by our organic chemistry classes) to measure boiling points at reduced pressures. We have found that the availability of state-of-the-art equipment need not limit the ability to teach and demonstrate fundamental principles
Krieger, Albert G.; Henderson, John W. J. Chem. Educ. 1996, 73, 1039.
Gases |
Physical Properties
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Ammonia Fountain and Density Gradient Column Miroslav Proksa
Demonstration combining the ammonia fountain with an acid-base indicator density column.
Proksa, Miroslav. J. Chem. Educ. 1995, 72, 931.
Solutions / Solvents |
Aqueous Solution Chemistry |
Physical Properties |
Gases |
Acids / Bases
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Demonstrating Simultaneous Boiling and Freezing (2) Ellison, Mike
Simple method of demonstrating simultaneous boiling and freezing of water using reduced pressure.
Ellison, Mike J. Chem. Educ. 1994, 71, 536.
Gases |
Physical Properties
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Demonstrating Simultaneous Boiling and Freezing (1) Hiza, Mark R.
Simple method of demonstrating simultaneous boiling and freezing of water using reduced pressure.
Hiza, Mark R. J. Chem. Educ. 1994, 71, 536.
Gases |
Physical Properties
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Collapsing Containers Brown, Justina L.; Battino, Rubin
Using plastic containers instead of metal containers in air pressure demonstrations.
Brown, Justina L.; Battino, Rubin J. Chem. Educ. 1994, 71, 514.
Gases |
Physical Properties
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Gas reactions in plastic bags: Relating laboratory observations to the atomic-molecular model Robinson, Maurice; Barrow, Gordon M.
Carrying out chemical reactions in Ziplock bags to investigate a variety of chemical concepts.
Robinson, Maurice; Barrow, Gordon M. J. Chem. Educ. 1992, 69, 1026.
Kinetic-Molecular Theory |
Gases |
Reactions |
Acids / Bases |
Oxidation / Reduction |
Photochemistry |
Atmospheric Chemistry |
Physical Properties
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The kinetic molecular theory and the weighing of gas samples Brenner, Henry C.
How is it possible to weigh gas samples since the molecules are constantly moving around and not always in contact with the floor of the container?
Brenner, Henry C. J. Chem. Educ. 1992, 69, 558.
Kinetic-Molecular Theory |
Gases |
Physical Properties
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Vapor pressure demonstrations using a butane lighter Delumyea, R. Del
The concept of the change of state of matter and particularly the volatitlity of liquids is an important concept taught in introductory chemistry courses.
Delumyea, R. Del J. Chem. Educ. 1992, 69, 321.
Gases |
Physical Properties |
Liquids |
Phases / Phase Transitions / Diagrams
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A metal bar to demonstrate one atmosphere Meloan, Clifton E.
This demonstration helps students gain a more intuitive understanding of units of pressure.
Meloan, Clifton E. J. Chem. Educ. 1988, 65, 69.
Gases |
Physical Properties
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Physical and chemical properties Boschmann, Erwin
A series of overhead demonstrations regarding physical and chemical properties.
Boschmann, Erwin J. Chem. Educ. 1987, 64, 891.
Physical Properties |
Liquids |
Precipitation / Solubility |
Magnetic Properties |
Kinetic-Molecular Theory |
Crystals / Crystallography |
Gases
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Carbon dioxide: Its principal properties displayed and discussed Bent, Henry A.
The principal properties of carbon dioxide demonstrated and discussed.
Bent, Henry A. J. Chem. Educ. 1987, 64, 167.
Physical Properties |
Phases / Phase Transitions / Diagrams |
Gases |
Kinetic-Molecular Theory
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Molecular size and Raoult's Law Kovac, Jeffrey
An additional cause for deviations from Raoult's Law that is rarely, if ever, mentioned in freshman chemistry texts.
Kovac, Jeffrey J. Chem. Educ. 1985, 62, 1090.
Molecular Properties / Structure |
Physical Properties |
Solutions / Solvents |
Gases
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The density and apparent molecular weight of air Harris, Arlo D.
Simple procedure for determining the density and apparent molecular weight of air.
Harris, Arlo D. J. Chem. Educ. 1984, 61, 74.
Atmospheric Chemistry |
Gases |
Molecular Properties / Structure |
Physical Properties
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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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A discovery experiment. CO2 soap bubble dynamics Millikan, Roger C.
Students often make a choice of major based upon the view of a subject that they derive from the beginning course. Rare are the chemistry courses that provide the excitement and chance for discovery, while providing a basic understanding of chemistry. This article describes an experiment that does provide such an opportunity.
Millikan, Roger C. J. Chem. Educ. 1978, 55, 807.
Gases |
Physical Properties |
Surface Science
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Gasoline vapor: An invisible pollutant Stephens, Edgar R.
An apparatus and procedure to demonstrate the substantial contribution vaporized gasoline makes to hydrocarbon pollution.
Stephens, Edgar R. J. Chem. Educ. 1977, 54, 682.
Physical Properties |
Gases |
Atmospheric Chemistry
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Apparatus for determining vapor density Uglum, K. L.; Carson, L. M.; Riley, R. V.
Presents a simplified vapor-density experiment suitable for use as a freshman demonstration or an undergraduate physical chemistry experiment.
Uglum, K. L.; Carson, L. M.; Riley, R. V. J. Chem. Educ. 1968, 45, 203.
Gases |
Laboratory Equipment / Apparatus |
Physical Properties
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A simple vacuum apparatus for lecture experiments Peterson, L. K.; Ruddy, F. H.
Describes a simple vacuum apparatus and examples of its use in lecture situations.
Peterson, L. K.; Ruddy, F. H. J. Chem. Educ. 1968, 45, 742.
Laboratory Equipment / Apparatus |
Gases |
Liquids |
Physical Properties |
Transport Properties |
Stoichiometry |
Calorimetry / Thermochemistry
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Manometric apparatus for vapor and solution studies Taha, Ahmed A.; Grigsby, Ronald D.; Johnson, James R.; Christian, Sherril D.; Affsprung, Harold E.
Presents a device that can be sued to obtain vapor density and PVT measurements, vapor pressures of solutions and liquids, dew-point pressures and compositions, solubilities of gases in liquids, solubilities of slightly-miscible liquids, equilibrium constants for association reactions in solutions, interactions of vapors and gases with solids, and gas and vapor viscosities.
Taha, Ahmed A.; Grigsby, Ronald D.; Johnson, James R.; Christian, Sherril D.; Affsprung, Harold E. J. Chem. Educ. 1966, 43, 432.
Laboratory Equipment / Apparatus |
Physical Properties |
Solutions / Solvents |
Gases |
Liquids |
Solids
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Determination of the density of oxygen gas Fiekers, B. A.
The "Oxybomb," a small cartridge of compressed oxygen, is used for determining the density of oxygen gas in laboratory or lecture.
Fiekers, B. A. J. Chem. Educ. 1954, 31, 139.
Gases |
Physical Properties
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