| Journal Articles: 33 results |
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An Inexpensive Solution Calorimeter Emma Kavanagh, Sam Mindel, Giles Robertson, and D. E. Peter Hughes
Describes the construction of a simple solution calorimeter, using a miniature bead thermistor as a temperature-sensing element, that has a response time of a few seconds and made it possible to carry out a thermometric reaction in under a minute.
Kavanagh, Emma; Mindel, Sam; Robertson, Giles; Hughes, D. E. Peter. J. Chem. Educ. 2008, 85, 1129.
Acids / Bases |
Aqueous Solution Chemistry |
Calorimetry / Thermochemistry |
Laboratory Equipment / Apparatus |
Thermal Analysis |
Thermodynamics
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Introduction of Differential Scanning Calorimetry in a General Chemistry Laboratory Course: Determination of Heat Capacity of Metals and Demonstration of the Law of Dulong and Petit Ronald P. D'Amelia, Vincent Stracuzzi, and William F. Nirode
The work described herein discusses the use of differential scanning calorimetry in a general chemistry laboratory course to determine the specific heat capacities of metals and introduce the empirical law of Dulong and Petit.
D'Amelia, Ronald P.; Stracuzzi, Vincent; Nirode, William F. J. Chem. Educ. 2008, 85, 109.
Calorimetry / Thermochemistry |
Heat Capacity |
Instrumental Methods |
Thermal Analysis
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Mass-Elastic Band Thermodynamics: A Visual Teaching Aid at the Introductory Level William C. Galley
Demonstrations of five spontaneous isothermal processes involving the coupling of a mass and elastic band and arising from combinations of enthalpy and entropy changes are presented and then dissected. Analogies are drawn between these processes and common spontaneous molecular events such as chemical reactions and phase transitions.
Galley, William C. J. Chem. Educ. 2007, 84, 1147.
Calorimetry / Thermochemistry |
Thermodynamics
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Useful Work of a Process Norman C. Craig
Acknowledgment of a flaw in the article, Lets Drive Driving Force Out of Chemistry.
Craig, Norman C. J. Chem. Educ. 2006, 83, 703.
Bioenergetics |
Biophysical Chemistry |
Calorimetry / Thermochemistry |
Thermodynamics
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Useful Work of a Process Bruno Lunelli
Clarifies a potentially misleading statement in the article, Lets Drive Driving Force Out of Chemistry.
Lunelli, Bruno. J. Chem. Educ. 2006, 83, 703.
Bioenergetics |
Biophysical Chemistry |
Calorimetry / Thermochemistry |
Thermodynamics
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The q/T Paradox: Which "Contains More Heat", a Cup of Coffee at 95°C or a Liter of Icewater? Ed Vitz and Michael J. Schuman
In this demonstration, heat is removed from 10 cm3 of water at ~95C and 42 cm3 of water at ~0C by adding each to a measured sample of liquid nitrogen. The heat removed from the water boils the N2(l), and the quantity of liquid nitrogen that is evaporated by boiling is determined. The quantity of heat that was absorbed is calculated from the heat of vaporization of liquid nitrogen and found to be about 10,000 J in the case of the hot water and 25,000 J in the case of the icewater.
Vitz, Ed; Schuman, Michael J. J. Chem. Educ. 2005, 82, 856.
Calorimetry / Thermochemistry |
Heat Capacity |
Phases / Phase Transitions / Diagrams |
Thermodynamics
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Let's Drive "Driving Force" Out of Chemistry Norman C. Craig
"Driving force" is identified as a misleading concept in analyzing spontaneous change. Driving force wrongly suggests that Newtonian mechanics and determinism control and explain spontaneous processes. The usefulness of the competition of ?H versus ?S in discussing chemical change is also questioned. Entropy analyseswhich consider the contributions to the total change in entropyare advocated.
Craig, Norman C. J. Chem. Educ. 2005, 82, 827.
Natural Products |
Bioenergetics |
Biophysical Chemistry |
Calorimetry / Thermochemistry |
Thermodynamics
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A Chemically Relevant Model for Teaching the Second Law of Thermodynamics Bryce E. Williamson and Tetsuo Morikawa
Presentation of a chemically relevant model that exemplifies many aspects of the second law: reversibility, path dependence, and extrapolation in terms of electrochemistry and calorimetry.
Williamson, Bryce E.; Morikawa, Tetsuo. J. Chem. Educ. 2002, 79, 339.
Calorimetry / Thermochemistry |
Electrochemistry |
Thermodynamics
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The Isothermal Heat Conduction Calorimeter: A Versatile Instrument for Studying Processes in Physics, Chemistry, and Biology Lars Wadsö, Allan L. Smith, Hamid Shirazi, S. Rose Mulligan, and Thomas Hofelich
A simple but sensitive isothermal heat-conduction calorimeter and five experiments for students to illustrate its use (heat capacity of solids, acid-base titration, enthalpy of vaporization of solvents, cement hydration, and insect metabolism).
Wadsö, Lars; Smith, Allan L.; Shirazi, Hamid; Mulligan, S. Rose; Hofelich, Thomas. J. Chem. Educ. 2001, 78, 1080.
Calorimetry / Thermochemistry |
Laboratory Equipment / Apparatus |
Thermal Analysis |
Thermodynamics
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Boerhaave on Fire Damon Diemente
This article offers a selection of passages from Boerhaave's chapter on fire. Boerhaave offers demonstrations and experiments that can be instructively performed today, quantitative data that can be checked against modern equations, and much theory and hypothesis that can be assessed in light of modern chemical ideas.
Diemente, Damon. J. Chem. Educ. 2000, 77, 42.
Calorimetry / Thermochemistry |
Thermodynamics
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Using TOPEX Satellite El Niño Altimetry Data to Introduce Thermal Expansion and Heat Capacity Concepts in Chemistry Courses Harvey F. Blanck
Warm water is less dense than cool water and will float somewhat like ice, with a portion above the surface of the cooler surrounding water. The height of the bump can be used to estimate the excess thermal energy in the warmer water.
Blanck, Harvey F. J. Chem. Educ. 1999, 76, 1635.
Liquids |
Thermodynamics |
Water / Water Chemistry |
Calorimetry / Thermochemistry
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An Apparatus for Temperature Displays George Papageorgiou and John Xenos
In this article, a new simple and low-cost apparatus is introduced that provides the possibility to display temperature measurements in any lecture hall. The apparatus provides analog displays. Its construction requires only simple and inexpensive materials.
Papageorgiou, George; Xenos, John. J. Chem. Educ. 1999, 76, 1094.
Calorimetry / Thermochemistry |
Laboratory Equipment / Apparatus
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An Integrated-Circuit Temperature Sensor for Calorimetry and Differential Temperature Measurement Mark Muyskens
Application of an integrated-circuit (IC) temperature sensor which is easy-to-use, inexpensive, rugged, easily computer-interfacable and has good precision is described. The design, based on the National Semiconductor LM35 IC chip, avoids some of the difficulties associated with conventional sensors (thermocouples, thermistors, and platinum resistance thermometers) and a previously described IC sensor.
Muyskens, Mark. J. Chem. Educ. 1997, 74, 850.
Calorimetry / Thermochemistry |
Thermal Analysis |
Thermodynamics |
Laboratory Equipment / Apparatus |
Instrumental Methods
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Heat Flow vs. Cash Flow: A Banking Analogy Charles M. Wynn, Sr.
An analogy is drawn between the withdrawal of money from an automated teller machine (ATM) and an exothermic chemical reaction.
Wynn, Charles M. Sr. J. Chem. Educ. 1997, 74, 397.
Thermodynamics |
Calorimetry / Thermochemistry
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Simple and Attractive Demonstraction of the Reversibility of Chemical Reactions Celestyn M. Brozek
The reversibility of chemical reactions is demonstrated by dehydration of CuSO4 5H2O and the subsequent hydration of CuSO4. The associated heat consumption and the subsequent heat production illustrate the concept of endothermic and exothermic reactions.
J. Chem. Educ. 1996, 73, 837.
Calorimetry / Thermochemistry |
Reactions
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Determination of Heats of Fusion: Using Differential Scanning Calorimetry for the AP Chemistry Course Susan M. Temme
Using differential scanning calorimetry (DSC) in AP chemistry.
Temme, Susan M. J. Chem. Educ. 1995, 72, 916.
Calorimetry / Thermochemistry |
Calorimetry / Thermochemistry |
Physical Properties |
Phases / Phase Transitions / Diagrams |
Thermal Analysis |
Thermodynamics
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A Pictorial Analogy for Energy Content and Temperature Thomas D. Crute
Analogy to help students distinguish between heat and temperature.
Crute, Thomas D. J. Chem. Educ. 1995, 72, 914.
Calorimetry / Thermochemistry
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Heat of solution of hydrogen chloride: A laboratory experiment Harms, Gregory S.; Lehman, Thomas A.
A simple technique for measuring the heat of solution of HCl in water.
Harms, Gregory S.; Lehman, Thomas A. J. Chem. Educ. 1993, 70, 955.
Acids / Bases |
Solutions / Solvents |
Calorimetry / Thermochemistry
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Using the electrician's multimeter in the chemistry teaching laboratory: Part 1. Colorimetry and thermometry experiments Andres, Roberto T.; Sevilla, Fortunato, III
The multimeter could be a very useful instrument for the chemistry laboratory bench. In this paper, the versatility of the multimeter in the chemistry teaching laboratory is demonstrated.
Andres, Roberto T.; Sevilla, Fortunato, III J. Chem. Educ. 1993, 70, 514.
Laboratory Equipment / Apparatus |
Equilibrium |
Stoichiometry |
Kinetics |
Calorimetry / Thermochemistry
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A spontaneous exothermic reaction between two solids: A safe demonstration Scott, Earle S.
Reaction between equal masses of hydroxylamine hydrochloride and sodium nitrite.
Scott, Earle S. J. Chem. Educ. 1992, 69, 1028.
Solids |
Calorimetry / Thermochemistry |
Reactions
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Experiments with "Calo-pH Meter" Paris, Michel R.; Aymes, Daniel J.
Paris, Michel R.; Aymes, Daniel J. J. Chem. Educ. 1990, 67, 510.
Laboratory Equipment / Apparatus |
Thermodynamics |
Calorimetry / Thermochemistry
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Further reflections on heat Hornack, Frederick M.
Confusion regarding the nature of heat and thermodynamics.
Hornack, Frederick M. J. Chem. Educ. 1984, 61, 869.
Kinetic-Molecular Theory |
Thermodynamics |
Calorimetry / Thermochemistry
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Determination of solution enthalpy: An easy and simple method Karunakaran, K.
A method that does not involve the preparation and analysis of saturated solutions at different temperatures.
Karunakaran, K. J. Chem. Educ. 1979, 56, 389.
Solutions / Solvents |
Calorimetry / Thermochemistry |
Laboratory Management
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The second law - How much, how soon, to how many? Bent, Henry A.
Discussion of the conceptual components of thermodynamics, their mathematical requirements, and where they might be best placed in the curriculum.
Bent, Henry A. J. Chem. Educ. 1970, 47, 337.
Thermodynamics |
Calorimetry / Thermochemistry
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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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Recent developments in calorimetry: Part two. Some associated measurements (cont.) Wilhoit, Randolph C.
Examines the measurement of electricity, calorimetric standards, solution calorimetry, and specific types of calorimeters.
Wilhoit, Randolph C. J. Chem. Educ. 1967, 44, A685.
Calorimetry / Thermochemistry |
Instrumental Methods |
Laboratory Equipment / Apparatus
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Recent developments in calorimetry (continued) Part 2. Some associated measurements Wilhoit, Randolph C.
Topics examined include thermocouples, resistance thermometers, thermistors, and quartz crystal thermometers.
Wilhoit, Randolph C. J. Chem. Educ. 1967, 44, A629.
Calorimetry / Thermochemistry |
Instrumental Methods |
Laboratory Equipment / Apparatus
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Recent developments in calorimetry. Part 1. Introductory survey of calorimetry Wilhoit, Randolph C.
Explores the scope and purpose of calorimetric investigation, types of calorimeters, areas of calorimetric investigation and the procedures and calculations involved.
Wilhoit, Randolph C. J. Chem. Educ. 1967, 44, A571.
Calorimetry / Thermochemistry |
Instrumental Methods |
Laboratory Equipment / Apparatus
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Energy B. Heat energy Klug, Evangeline B.; Hornbeck, Leroy G.; Alyea, Hubert N.
Demonstrations of the heat of crystallization (sodium acetate and Na2S2O3[5H2O]), heat of formation (ZnCl2), heat of hydration (CaO and CuSO4), heat of neutralization, heat of solvation (alcohols), evaporation of ether and methyl chloride, and heat of solution (NH4NO3).
Klug, Evangeline B.; Hornbeck, Leroy G.; Alyea, Hubert N. J. Chem. Educ. 1966, 43, A1079.
Reactions |
Calorimetry / Thermochemistry |
Aqueous Solution Chemistry |
Phases / Phase Transitions / Diagrams |
Crystals / Crystallography |
Precipitation / Solubility
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Thermochemical investigations for a first-year college chemistry course. A survey of existing literature Ewing, Galen W.
The purpose of this article is to review some of the experiments that appear in the literature involving thermochemistry.
Ewing, Galen W. J. Chem. Educ. 1965, 42, 26.
Calorimetry / Thermochemistry
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Relationship of exothermicities of compounds to chemical bonding Siegel, Bernard
The sign and magnitude of the standard heat of formation of a chemical compound is often used incorrectly to characterize its relative stability compared to other compounds.
Siegel, Bernard J. Chem. Educ. 1963, 40, 308.
Calorimetry / Thermochemistry |
Covalent Bonding
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Water equivalent of vacuum flask calorimeter by the ice fusion method Dunicz, Boleslaw Ludwik
Presents the design of a vacuum flask calorimeter and describes the determination of its water equivalent by the ice fusion method.
Dunicz, Boleslaw Ludwik J. Chem. Educ. 1960, 37, 635.
Calorimetry / Thermochemistry |
Laboratory Equipment / Apparatus
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A common misunderstanding of Hess' law Davis, Thomas. W.
The statement, sometimes attributed to Hess, that "In any series of chemical or physical changes the total heat effect is independent of the path by which the system goes from its initial to its final state" is incorrect.
Davis, Thomas. W. J. Chem. Educ. 1951, 28, 584.
Stoichiometry |
Acids / Bases |
Aqueous Solution Chemistry |
Calorimetry / Thermochemistry
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