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在学习溶液知识时大家已经知道,许多物质在溶解的时候都会引起溶液温度的变化,这种由于溶质溶解而造成的吸热或放热现象就是溶解过程的热效应。用来测试溶解过程热效应的方法有多种:使用温度计直接测试;通过表层皮肤进行体验;通过水结冰、蜡融化等方式间接测试。下面为同学们介绍一种利用自制简易温度计来测试溶解热效应的方法。1.制作简易温度计制作材料:透明小塑料瓶(硬质或软质均可)一个,废弃的中性
As we all know in the learning of solution, many substances will cause the solution temperature to change when it dissolves. The endothermic or exothermic phenomenon caused by solute dissolution is the thermal effect of the dissolution process. There are several ways to test the thermal effects of the dissolution process: direct testing with a thermometer; experiencing through the superficial skin; indirect testing with water freezing and wax melting. The following for students to introduce a simple self-made thermometer to test the effect of dissolved heat method. 1. Production of simple thermometer making materials: Transparent small plastic bottles (hard or soft can be) an abandoned neutral