比热的概念是初中物理热学部分的重点内容,但学生对这个概念却不容易掌握,教师必须通过实验手段方能突破这个难点。现行的初三物理教材是通过第62页图3-1所示的实验装置进行演示的。我认为这个演示实验是有缺陷的:一方面,多数学生看不清两个温度计升高的度数,另一方面,两盏酒精灯的火陷的大 The concept of specific heat is a key part of the physical thermal part of junior middle school, but students are not easy to grasp this concept. Teachers must overcome this difficulty through experimental means. The current third physics textbook is demonstrated by the experimental device shown in Figure 3-1 on page 62. I think this demo experiment is flawed: On the one hand, most students cannot see the two thermometers rising in height. On the other hand, the two fire lamps have a big depression.