Improving Understanding of Hess's Law with Handheld Technology
ZHANG Hui-Min1,2, QIAN Yang-Yi1**, LI Qi-Lin1,3, LIN Dan-Ping1,4, FAN Wan-Zhen5
1. School of Chemistry, South China Normal University, Guangzhou 510006, China;
2. Baoan Middle School (Group)The 2nd Foreign Language School, Shenzhen 518000, China;
3. No.1 Middle School of Zhongshan, Zhongshan 528403, China;
4. Shenzhen Xin'an Middle School (Group), Shenzhen 518000, China;
5. Guangdong Guangya High School, Guangzhou 510106, China
Abstract This research measured the thermal effects of three experiments, learning from the determination of neutralization heat experiment in the textbook, based on the multi-transformation and comparative construction cognitive model, with the help of handheld technology and improved device. This paper analyzed the research results based on quadruple representations theory and successfully verified Hess's law with experiments. The method not only overcomes the conventional method's faults such as complex operation, poor visual effects and high experimental error, but also helps to improve students' chemical key competencies. This research is a good supplement to the textbooks, and it provides a reference for the teaching of Hess's law.
ZHANG Hui-Min, QIAN Yang-Yi, LI Qi-Lin, LIN Dan-Ping, FAN Wan-Zhen. Improving Understanding of Hess's Law with Handheld Technology[J]. Chinese Journal of Chemical Education, 2020, 41(19): 90-97.
