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ERIC Number: EJ1202242
Record Type: Journal
Publication Date: 2019-Jan
Pages: 6
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
Teaching Boyle's Law and Charles' Law through Experiments That Use Novel, Inexpensive Equipment Yielding Accurate Results
Limpanuparb, Taweetham; Kanithasevi, Siradanai; Lojanarungsiri, Maytouch; Pakwilaikiat, Puh
Journal of Chemical Education, v96 n1 p169-174 Jan 2019
We discuss the use of a simple piece of equipment made of a 50 mL syringe attached to a 2 mL graduated pipet to demonstrate Boyle's law and Charles's law. A plot of the hydrostatic pressure against the reciprocal of the volume of the gas read from the equipment is linear as discussed in the paper and gives the atmospheric pressure at the y-intercept. A plot of the volume of the gas against the Celsius temperature of the gas is also linear as discussed in the paper and gives the absolute zero at the x-intercept. This plastic "high-precision syringe" is simple, disposable, and inexpensive (<1 USD per set) but can yield a high correlation coefficient (class median r[superscript 2] = 0.95) and accurate results (class median within 1% from P[subscript atm] = 101 kPa or within 5 °C from -273 °C). These results are achieved because changes in gas volume are read precisely on the graduated lines of the pipet, and the change is significant because of the amount of gas in the syringe. In addition to the two gas laws, this experiment can also be used to teach glassware scale reading, error analysis, use of a spreadsheet program, and statistical analysis.
Division of Chemical Education, Inc. and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education; Secondary Education; High Schools
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A