Using a modified Boyle’s law experiment to estimate the density of salts

2019 ◽  
Vol 57 (1) ◽  
pp. 58-59
Author(s):  
Joel D. Krehbiel ◽  
Kenton N. Schroeder ◽  
Harune Suzuki ◽  
Nelson Kilmer
Keyword(s):  
Boyle’S Law

Innovation in Teaching Methodology: Level of Student Acceptance of ‘Boyles Law Apparatus’ Teaching Aids in Thermodynamics Course

2021 ◽  
Vol 2 (1) ◽  
pp. 46-54
Author(s):  
Suhaila Mohd Sharif ◽  
Mohd Fitri Basiran ◽  
Norhazlina Amon
Keyword(s):  
Teaching And Learning ◽  
Descriptive Analysis ◽  
Teaching Methodology ◽  
Perfect Gas ◽  
Teaching Aids ◽  
Clear Vision ◽  
Spss Software ◽  
High Level ◽  
Boyle’S Law ◽  
Student Acceptance

Boyle's law is used to explain the inverse relationship between pressure and the volume of gas at a constant temperature. This law states that when the pressured container is filled by increasing gas, thus the total volume will decrease. This research paper aims to study the level of student acceptance of teaching based on teaching aids (TA) Boyle's Law Apparatus (BLA) in the teaching and learning for the DJJ20063 Thermodynamics course. The questionnaire study was distributed to 66 respondents, namely Port Dickson Polytechnic‟s students of semester 2, Diploma in Mechanical Engineering program December 2019 session who involved in lectures where TA is used to give the students a clear vision in understanding the concept of Boyle Law in the topic of Perfect Gas. The data were analysed by using SPSS software through descriptive analysis statistics. The results of the study showed that the level of effectiveness of this TA is at a high level with an average mean score of 3.70 and standard deviation 0.447. Therefore, studies showed that the use of this teaching aids among students provides a better understanding, especially on the topic of Perfect Gas compared to teaching methods without the teaching aids that had been produced before. Through this method as well, the study found that students' interest and determination to deepen a lesson can be nurtured in more depth.

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

2018 ◽  
Vol 96 (1) ◽  
pp. 169-174 ◽  
Author(s):  
Taweetham Limpanuparb ◽  
Siradanai Kanithasevi ◽  
Maytouch Lojanarungsiri ◽  
Puh Pakwilaikiat
Keyword(s):  
Boyle’S Law

The Loch Ness monster, gannets, and Boyle's law

1989 ◽  
Vol 66 (7) ◽  
pp. 570 ◽  
Author(s):  
Ronald DeLorenzo
Keyword(s):  
Boyle’S Law

scholarly journals Development of 'Boyles Law Apparatus' Teaching Aids for Thermodynamics Course: Innovation in Teaching Methodology

2021 ◽  
Vol 2 (1) ◽  
pp. 36-45
Author(s):  
Mohd Fitri Basiran ◽  
Suhaila Mohd Sharif ◽  
Sharifah Enne Suhaini Syed Mohd Zahari
Keyword(s):  
Teaching And Learning ◽  
Learning System ◽  
Teaching Methodology ◽  
Perfect Gas ◽  
Teaching Aids ◽  
Effective Delivery ◽  
Basic Concepts ◽  
Course Innovation ◽  
Gas Volume ◽  
Boyle’S Law

Teaching aids are among the most important instruments in providing effective delivery results as well as the best understanding to students. Therefore, this teaching aid should also be in the Thermodynamics course and among the topics whose concept is quite difficult to understand by students is Boyles Law in the topic of Perfect Gas. Boyle's law is used to explain the inverse relationship between pressure and gas volume at a constant temperature. This law states that when the pressure of the container is filled with increasing gas, then the total volume will decrease. Boyles' Law on the topic of Perfect Gas is also one of the important topics and it is the basis in Thermodynamics. This paper is about the development of Boyle's Law Apparatus (BLA) teaching aids (TA) for the DJJ20063 Thermodynamics course at Port Dickson Polytechnic which is an apparatus that can explain to students related to the basic concepts of Boyle's Law. In addition, this teaching aids can also help lecturers in providing a better understanding to students who take Thermodynamics courses. The production of this tool is not only used by lecturers in the theory class but also this tool can also be used for practical needs in the laboratory. In conclusion, a suitable apparatus for explaining Boyle's Law to students has been successfully designed and developed. In this regard, hopefully the innovation of this teaching aids will be able to benefit all parties in improving the teaching and learning system, especially for Thermodynamics course.

The second virial coefficients of mixed polar vapours

1959 ◽  
Vol 249 (1258) ◽  
pp. 414-426 ◽  
Keyword(s):  
Methyl Acetate ◽  
Virial Coefficient ◽  
Methyl Formate ◽  
Second Virial Coefficient ◽  
Virial Coefficients ◽  
Ethyl Formate ◽  
Carbonyl Oxygen ◽  
Second Virial Coefficients ◽  
Theoretical Significance ◽  
Boyle’S Law

The second virial coefficients of binary mixtures of chloroform with methyl formate, n -propyl formate, methyl acetate, ethyl acetate and diethylamine have been measured in a ‘Boyle’s law apparatus’ at temperatures between 50 and 95 °C. The measured values are consistently higher than predicted by the theory of corresponding states, and a quantitative interpretation is proposed, based on the hypothesis that the esters and amine are partially dimerized and are involved in association with the chloroform by hydrogen bonding. A linear relation is shown to exist between the heats and entropies of association for the various mixtures, and the theoretical significance of this is discussed. There is some evidence that hydrogen bonds are formed through the alkoxyl oxygen by formate esters and through the carbonyl oxygen by acetate esters. The paper includes data on the second virial coefficient for the pure esters and for ethyl formate and methyl propionate.

Richard Towneley and Boyle's Law

Nature ◽  
1963 ◽  
Vol 197 (4864) ◽  
pp. 226-228 ◽  
Author(s):  
C. WEBSTER
Keyword(s):  
Boyle’S Law

scholarly journals IV. On a new manometer, and on the law of the pressure of gases between 1⋅5 and 0⋅01 millimetres of mercury

1901 ◽  
Vol 196 (274-286) ◽  
pp. 205-223 ◽  
Keyword(s):  
The Other ◽  
Differential Manometer ◽  
Narrow Passage ◽  
The Law ◽  
The Difference ◽  
Boyle’S Law

The behaviour of air and other gases at low densities is a subject which presents peculiar difficulties to the experimenter, and highly discrepant results have been arrived at as to the relations between density and pressure. While Mendeleef and Siljerström have announced considerable deviations from Boyle’s law, Amagat finds that law verified in the case of air to the full degree of accuracy that the observations admit of. In principle Amagat’s method is very simple. The reservoir consists mainly of two nearly equal bulbs, situated one above the other and con­nected by a comparatively narrow passage. By the rise of mercury from a mark below the lower bulb to another on the connecting passage, the volume is altered in a known ratio which is nearly that of 2:1. The corresponding pressures are read with a specially constructed differential manometer. Of this the lower part which penetrates the mercury of the cistern is single. Near the top it divides into a U, widening at the level of the surface of the mercury into tubes of 2 centims. diameter. Higher up again these tubes re-unite and by means of a three-way tap can be con­nected either with an air-pump or with the upper bulb. Suitable taps are provided by which the two branches can be isolated from one another. During the observa­tions one branch is vacuous and the other communicates with the enclosed gas, so that the difference of levels represents the pressure. This difference is measured by a cathetometer. It is evident that when the pressure is very low the principal difficulty relates to the measurement of this quantity, and that the errors to be feared in respect to volume and temperature are of little importance. Amagat, hilly alive to this aspect of the matter, took extraordinary pains with the manometer and with the cathetometer by which it was read. An insidious error may enter from the refraction of the walls of the tubes through which the mercury surfaces are seen. But after all his precautions Amagat found that he could not count upon anything less than 1/100 millim., even in the means of several readings. It may be well to give his exact words (p. 494):—“Dans les expériences dont je donnerai plus loin les résultats numériques, les déterminations sont faites en général en alternant cinq fois les lectures sur chaque menisque; les lectures étaient faites au demi-centième, et les divergences dans les séries régulières oscillent ordinairement entre un centième et un centième et demi; en prenant la moyenne, il ne faut pas compter sur plus d’un centième; et cela, bien entendu, sans tenir compte des causes d’erreur indépendantes de la lecture cathétometrique . . . . . . Les résultats numériques consignés aux Tableaux que je vais donner maintenant sont eux-mêmes la moyenne de plusieurs expériences; car, outre que les lectures out été faites en général cinq fois en alternant, on est toujours, après avoir réduit le volume à moitié, revenu au volume primitif, puis au volume moitié: chaque expérience a done été faite aux moins deux fois, et sou vent trois et quatre.”

Body composition by air-displacement plethysmography by using predicted and measured thoracic gas volumes

1998 ◽  
Vol 84 (4) ◽  
pp. 1475-1479 ◽  
Author(s):  
Megan A. McCrory ◽  
Paul A. Molé ◽  
Terri D. Gomez ◽  
Kathryn G. Dewey ◽  
Edmund M. Bernauer
Keyword(s):  
Body Composition ◽  
Body Volume ◽  
Air Displacement Plethysmography ◽  
Bod Pod ◽  
Individual Basis ◽  
Thoracic Gas Volume ◽  
Significant Difference ◽  
Hydrostatic Weighing ◽  
Gas Volume ◽  
Boyle’S Law

The BOD POD, a new air-displacement plethysmograph for measuring human body composition, utilizes the inverse relationship between pressure and volume (Boyle’s law) to measure body volume directly. The quantity of air in the lungs during tidal breathing, the average thoracic gas volume (Vtg), is also measured by the BOD POD by using a standard plethysmographic technique. Alternatively, the BOD POD provides the use of a predicted Vtg (Vtgpred). The validity of using Vtgpred in place of measured Vtg (Vtgmeas) to determine the percentage of body fat (%BF) was evaluated in 50 subjects (36 women, 14 men; ages 18–56 yr). There was no significant difference between Vtgmeas and Vtgpred (mean difference ± SE, 53.5 ± 63.3 ml) nor in %BF by using Vtgmeas vs. Vtgpred (0.2 ± 0.2 %BF). On an individual basis, %BF measured by using Vtgmeas vs. Vtgpred differed within ±2.0% BF for 82% of the subjects; maximum differences were −2.9 to +3.0% BF. For comparison, data from 24 subjects who had undergone hydrostatic weighing were evaluated for the validity of using predicted vs. measured residual lung volume (Vr pred vs. Vr meas, respectively). Differences between Vr meas and Vr pred and in %BF calculated by using Vr meas vs. Vr pred were significant (187 ± 46 ml and 1.4 ± 0.3% BF, respectively; P < 0.001). On an individual basis, %BF determined by using Vr meas vs. Vr preddiffered within ±2.0% BF for 46% of the subjects; maximum differences were −2.9 to +3.8% BF. With respect to %BF measured by air displacement, our findings support the use of Vtgpred for group mean comparisons and for purposes such as screening in young to middle-aged individuals. This contrasts with the use of Vr pred in hydrostatic weighing, which leads to significant errors in the estimation of %BF. Furthermore, although the use of Vtgpred has some application, determining Vtgmeas is relatively simple in most cases. Therefore, we recommend that the use of Vtgmeas remain as standard experimental and clinical practice.

Sign in / Sign up

Export Citation Format

Share Document