Research On Improvement Of Middle School Chemistry Experiment Based On Smart Phone Temperature Sensing

Experimental teaching is an important part of chemistry teaching,which plays the role of mutual verification between theory and practice,and experimental improvement is one of the ways for experiments to continuously conform to social development.According to the requirements of the new curriculum standard for core literacy,chemistry experiment teaching is more intuitive,students can directly acquire knowledge from it,build cognitive models,help students understand abstract concepts,and cultivate students’knowledge-building ability.In recent years,with the development of science and technology,the experimental instruments and experimental methods of chemical experiments are also undergoing tremendous changes,towards the development of informatization,miniaturization,digitization,greening,economy,handheld technology,etc.life is close.But,due to the imbalance of regional economic development,the experiment development and experiment reform process are also uneven,and the digital experiment process is more affected by the economy.However,since the experimental results obtained by the digital experiment are better,more in line with the principle of intuitiveness,and can improve the core literacy of students,it is still necessary to continue to improve the experimental content and experimental methods.In this study,through the research and analysis of chemistry textbooks and chemistry curriculum standards,combined with relevant literature on experimental improvement,the content,experimental equipment,and experimental methods of middle school chemistry experiments were optimized and improved to better assist teaching.Specifically divided into the following three parts:Part one,introduction.Starting from the origin and development process of chemical experiment reform in my country,through the research and analysis of the current situation of chemical experiment teaching at home and abroad,and the current situation of digital experiments of handheld technology in my country,it is found that there is still a relatively large room for improvement in digital experiments based on handheld technology.The research content,theoretical basis,research method and research process of experimental improvement.The second part,a survey of interviews with middle school teachers in the author’s urban area.Through the analysis of the interview results of the interviewees,we can understand the development of experiments in each school,the introduction of digital experiments,and the effect of digital experiment teaching.The third part contains the following four experiments:（1）The experimental improvement of"comparison of intermolecular forces".After studying the teaching materials and curriculum standards,the existing experimental improvement methods are reviewed.On the basis of hand-held technology,the experimental methods for comparing the magnitude of intermolecular interactions are improved.（2）The verification of"Gaisce’s law".After studying the teaching materials and curriculum standards,the existing experimental improvement methods are reviewed,and the experimental methods for verifying"Gaisce’s law"are improved on the basis of handheld technology.（3）The experimental improvement of the heat of solution.After studying the teaching materials and curriculum standards,the existing experimental improvement methods are reviewed.On the basis of the hand-held technology,the experimental methods of the"endothermic or exothermic phenomenon during dissolution"experiment are improved.（4）Explore the speed of temperature change of O₂and different concentrations of CO₂under the same conditions.After studying the textbooks and curriculum standards,the existing improvement methods are reviewed.On the basis of hand-held technology,the experiments on temperature changes of O₂and CO₂gases with different concentrations under the same heating conditions are improved.Summarize the results of the paper,and summarize the shortcomings of the paper,and look forward to the future digital experimental experiments.