An Exercise with Boyle's law

Moeller, Michael B.

doi:10.1021/ed055p584.1

Cited by 2 publications

(4 citation statements)

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“…Both values are obtained by linear extrapolation to intercepts and can be sensitive to errors. Possible sources of errors in this experiment include reading/recording error, temperature inconsistency (due to rapid heating, ambient air and experimenter’s hand), solubility of air in water, vapor pressure of water, , surface tension of water, use of linear regression on nonlinear model (for Boyle’s law only), the deviation of pressure due to equipment not in vertical position ,, (for Boyle’s law only), and failure to read the changing value in time (for Charles’ law only).…”

Section: Resultsmentioning

confidence: 99%

“…• For more advanced experiments, the nonlinear fitting 45 may be applied to the Boyle's law experiment and other gases may be used instead of air. Possible sources of errors in this experiment include reading/ recording error, temperature inconsistency (due to rapid heating, ambient air and experimenter's hand), solubility of air in water, 36 vapor pressure of water, 13,30 surface tension of water, 30 use of linear regression on nonlinear model 45 (for Boyle's law only), the deviation of pressure due to equipment not in vertical position 4,16,25 (for Boyle's law only), and failure to read the changing value in time (for Charles' law only). Lab reports were graded and returned with a questionnaire that includes plus/delta questions, student's learning experience, and numerical ratings of the activities.…”

Section: Alternative Presentationmentioning

confidence: 99%

“…The ideal gas law ( PV = nRT ) is one of the early discoveries in science commonly taught in introductory level chemistry. , The concept of the gas law is the integral foundation for other advanced topics in chemistry and physics. Many authors − have devised experiments to teach Boyle’s law − ( P ∝ 1/ V ) and Charles’ law ( V ∝ T ) to students in secondary and tertiary levels. In earlier times, most procedures ,,,, were used for demonstration by instructors rather than for student laboratory exercises because of difficulties in setup and operation and the cost to run the experiments.…”

Section: Introductionmentioning

confidence: 99%

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Teaching Boyle’s Law and Charles’ Law through Experiments that Use Novel, Inexpensive Equipment Yielding Accurate Results

et al. 2018

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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 2 ≥ 0.95) and accurate results (class median within 1% from P 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.

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Section: Resultsmentioning

confidence: 99%

Section: Alternative Presentationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Teaching Boyle’s Law and Charles’ Law through Experiments that Use Novel, Inexpensive Equipment Yielding Accurate Results

et al. 2018

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“…Boyle's law is one of the major topics of discussion in general chemistry and high school chemistry. Several experiments that students can do in the laboratory to "discover" Boyle's law (1)(2)(3) and demonstrations that teachers can perform in the classroom to illustrate this law (4)(5)(6)(7)(8) have been published in this Journal. It is also important that the students are exposed to how Boyle's law can be effectively applied in various real-life situations.…”

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confidence: 99%