SUCRA(さくら: Saitama University Cyber Repository of Academic Resources)は、埼玉大学に在籍する研究者の学術雑誌論文、紀要論文、科学研究費補助金成果報告書、学位論文、研究発表プレゼン資料などを登録し、広く世界に発信しています。 埼玉大学に在籍する皆様は、著作物をSUCRAを通じて発信することができます。詳しくは「成果物の登録方法」をご覧ください。
Faculty of Education, Saitama University
Faculty of Education, Saitama University
Faculty of Education, Saitama University
雑誌名
埼玉大学紀要. 教育学部
巻
71
号
1
ページ
305 - 313
発行年
2022
年月次
2022
出版者名
埼玉大学教育学部
出版者名（別言語）
Faculty of Education, Saitama University
ISSN
18815146
抄録
We improved the method of measuring specific heat of ethanol based on Newton’s law of cooling in physical experiments by changing how the cooling times of ethanol and distilled water are measured. In our previous experiments on the cooling method, the obtained specific heat value often did not coincide with the previously reported value. The specific heat value is obtained from the weight of ethanol and water, their cooling times, and the water equivalent of the experimental tools used in this study. To clarify the reason for mismatch between the experimental and the previously reported specific heat values, we examined the effect that the aforementioned five characteristics had on the specific heat value. We determined that the weight of the liquid and water equivalents had a relatively small impact, whereas the accuracy in measuring the cooling time had a substantial effect on the value of the specific heat of ethanol. We precisely measured the amount of time needed for the temperature of ethanol and distilled water reach 45 ℃ and 35 ℃ using a stopwatch and found that the obtained specific heat value improved to 0.685 cal / ( g･K ) which is a negligible 5% difference from that previously reported.
冷却法による比熱測定方法の改善<数学・自然科学>
KY-AA12318206-7101-19.pdf
(927.91KB)
SUCRAの概要
