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      액체 혼합물의 끓음에 대한 예비 화학교사의 이해 = Pre-service Chemistry Teachers’ Understanding of the Boiling Process of a Liquid Mixture

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      https://www.riss.kr/link?id=A101786707

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      다국어 초록 (Multilingual Abstract)

      The goal of this study is to investigate pre-service chemistry teachers’ understanding of the boiling process of a liquid mixture. We surveyed 65 students in the chemistry program of the College of Education about the boiling point of a 50%(by mole) ethanol aqueous solution and the temperature changes during heating. We then interviewed 9 of these students. According to the survey results, the percent of the pre-service teachers who thought that the boiling point of the ethanol solution would be ‘between the boiling points of ethanol and water (78-100 ℃)’ and ‘the same as that of ethanol’ were 52.3% and 35.4%, respectively. The majority of those who stated the former explained that the boiling point of the ethanol solution increased due to the effects of attraction or blocking by water molecules. Most of those who believed the latter explained that physical properties such as the boiling point would not be changed by the addition of water. With regard to the temperature change during heating, 69.2% of the teachers thought that the temperature would increase gradually while boiling, which some thought resulted from the increasing amount of water in the solution as the ethanol boiled off. Others thought that two temperature plateaus would be observed as each component of the liquid mixture underwent phase transition at its specific boiling point. When asked about the particle model of the gas phase during the boiling and evaporation process, some students drew both ethanol and water during evaporation but only ethanol when boiling. We discussed several alternative concepts of pre-service chemistry teachers about the boiling process of liquid mixtures and ways to improve their understanding.
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      The goal of this study is to investigate pre-service chemistry teachers’ understanding of the boiling process of a liquid mixture. We surveyed 65 students in the chemistry program of the College of Education about the boiling point of a 50%(by ...

      The goal of this study is to investigate pre-service chemistry teachers’ understanding of the boiling process of a liquid mixture. We surveyed 65 students in the chemistry program of the College of Education about the boiling point of a 50%(by mole) ethanol aqueous solution and the temperature changes during heating. We then interviewed 9 of these students. According to the survey results, the percent of the pre-service teachers who thought that the boiling point of the ethanol solution would be ‘between the boiling points of ethanol and water (78-100 ℃)’ and ‘the same as that of ethanol’ were 52.3% and 35.4%, respectively. The majority of those who stated the former explained that the boiling point of the ethanol solution increased due to the effects of attraction or blocking by water molecules. Most of those who believed the latter explained that physical properties such as the boiling point would not be changed by the addition of water. With regard to the temperature change during heating, 69.2% of the teachers thought that the temperature would increase gradually while boiling, which some thought resulted from the increasing amount of water in the solution as the ethanol boiled off. Others thought that two temperature plateaus would be observed as each component of the liquid mixture underwent phase transition at its specific boiling point. When asked about the particle model of the gas phase during the boiling and evaporation process, some students drew both ethanol and water during evaporation but only ethanol when boiling. We discussed several alternative concepts of pre-service chemistry teachers about the boiling process of liquid mixtures and ways to improve their understanding.

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      참고문헌 (Reference)

      1 Canpolat, N., 28 : 1757-, 2006

      2 Johnson, P., 20 : 567-, 1998

      3 Osborne R. J., 28 : 363-, 1983

      4 Canpolat, N., 83 : 1237-, 2006

      5 Pinarbasi, T., 10 : 273-, 2009

      6 조부경, "증발과 증발 조건에 관한 활동에서 유·초·중학교 학생들의 개념 유형 및 학년별 경향성에 관한 연구" 한국과학교육학회 22 (22): 286-298, 2002

      7 김성혜, "묽은 용액의 성질에 대한 교과서 내용 분석 및 화학전공교사의 사고유형 조사" 한국과학교육학회 28 (28): 291-301, 2008

      8 윤희숙, "끓는점 오름 현상에 대한 학생, 예비교사, 화학교사의 개념 분석" 한국과학교육학회 26 (26): 805-812, 2006

      9 "http://en.wikipedia.org/wiki/Ethanol_%28data_page%29#Properties _of_aqueous_ethanol_solutions"

      10 Lee, E. S., "Survey of teachers and pre-teachers’ understanding of colligative properties in high school chemistry II" Korea National University of Education Graduate School of Education 2007

      1 Canpolat, N., 28 : 1757-, 2006

      2 Johnson, P., 20 : 567-, 1998

      3 Osborne R. J., 28 : 363-, 1983

      4 Canpolat, N., 83 : 1237-, 2006

      5 Pinarbasi, T., 10 : 273-, 2009

      6 조부경, "증발과 증발 조건에 관한 활동에서 유·초·중학교 학생들의 개념 유형 및 학년별 경향성에 관한 연구" 한국과학교육학회 22 (22): 286-298, 2002

      7 김성혜, "묽은 용액의 성질에 대한 교과서 내용 분석 및 화학전공교사의 사고유형 조사" 한국과학교육학회 28 (28): 291-301, 2008

      8 윤희숙, "끓는점 오름 현상에 대한 학생, 예비교사, 화학교사의 개념 분석" 한국과학교육학회 26 (26): 805-812, 2006

      9 "http://en.wikipedia.org/wiki/Ethanol_%28data_page%29#Properties _of_aqueous_ethanol_solutions"

      10 Lee, E. S., "Survey of teachers and pre-teachers’ understanding of colligative properties in high school chemistry II" Korea National University of Education Graduate School of Education 2007

      11 Cho, M. J., "Survey of high school students and chemistry teacher’s perceptions on evaporation and boiling" Korea National University of Education Graduate School of Education 2004

      12 Kim, Y. A., "Survey of elementary school teachers’ perceptions on evaporation and boiling, and analysis of textbooks" Korea National University of Education Graduate School of Education 2013

      13 Ko, K. Y., "Research on teaching guidance for vapour-pressure lowering, boiling-point elevation, freezing-point depression of dilute solution using entropy" Yonsei University of Graduate School of Education 2014

      14 Engel, T., "Physical Chemistry" Prentice Hall 2012

      15 Atkins, P., "Physical Chemistry" Oxford University Press 2010

      16 Jeon, J. S., "Middle school students’ concepts investigation on evaporation and boiling" Korea National University of Education Graduate School of Education 2003

      17 Shin, Y. J., "Middle School Science 2" Chunjae Textbook 2012

      18 Lee, M. W., "Middle School Science 2" Kumsung Press 2012

      19 Lee, S. I., "Middle School Science 2" Jihak-sa 2012

      20 Park, H. S., "Kyohak-sa. Middle School Science 2" Jihak-sa 2012

      21 Brady, J. E, "Chemistry: the molecular nature of matter" Wiley 2012

      22 Kim, S., "Case study on the relation between pre-serviced teachers’ understanding of “dilute solutions properties” and the curriculum in the college of education" Korea National University of Education Graduate School of Education 2008

      23 Haynes, W. M., "CRC Handbook of Chemistry and Physics" Taylor & Francis 1963

      24 Ministry of Education Science and Technology, "2009 revised science curriculum (Ministry of Education, Science and Technology Announcement No. 2011-361)"

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      2023 평가예정 해외DB학술지평가 신청대상 (해외등재 학술지 평가)
      2020-01-01 평가 등재학술지 유지 (해외등재 학술지 평가) KCI등재
      2011-01-01 평가 등재학술지 유지 (등재유지) KCI등재
      2009-01-01 평가 등재학술지 유지 (등재유지) KCI등재
      2007-01-01 평가 등재학술지 유지 (등재유지) KCI등재
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      1999-07-01 평가 등재후보학술지 선정 (신규평가) KCI등재후보
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      학술지 인용정보

      학술지 인용정보
      기준연도 WOS-KCI 통합IF(2년) KCIF(2년) KCIF(3년)
      2016 0.21 0.21 0.18
      KCIF(4년) KCIF(5년) 중심성지수(3년) 즉시성지수
      0.18 0.14 0.364 0.05
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