“比热容”是初中物理中最难理解的一个概念,是表示物质吸、放热能力大小的物理量。我们怎样才能简单、形象、直观地比较出不同物质吸、放热能力不同呢?咱们一起动手自制一个“比热容演示器”就一目了然了。一、准备材料有机玻璃板(60厘米×80厘米)一块、细玻璃管(60厘米)5根、同型号的小塑料瓶(药房装医用酒精的)5个、输液管5套、4Ω电阻丝5段(电炉丝可行)、橡胶塞5个、注射 “Specific heat capacity ” is one of the most difficult to understand in junior middle school physics, and it is a physical quantity that indicates the size of the substance that absorbs and exotherm. How can we compare the absorption of different substances in a simple, vivid and intuitive way, so that we can create a “specific heat capacity demonstrator” at a glance. First, the preparation of materials Plexiglass plate (60 cm × 80 cm) a thin glass tube (60 cm) 5, the same type of small plastic bottles (pharmacy medical alcohol) 5, 5 sets of infusion tubes, 4Ω resistance wire 5 sections (electric wire feasible), rubber stopper 5, injection