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量热器是测量反应热的装置,要求有较好的保温性能。最好是采用保温瓶式的,根据中学实验的需要,我们设计了一个简易量热器,供大家参考。如图:用一个罐头大口瓶,在原铁盖的中间打一直径1.5cm 左右的孔,将一个50ml 的小锥形瓶插入。为了便于保温,可在铁盖下面衬上一层硬纸板。在大口瓶的下部装上碎纸屑和硬纸板,既可隔热又可固定锥形瓶,四周由空气绝热。设计这样的装置,便于在实验过程中观察液面和反应情况。温度计用橡皮塞固定在
The calorimeter is a device for measuring the heat of reaction and requires a good heat insulating performance. It is best to use a thermos bottle. According to the needs of middle school experiments, we designed a simple calorimeter for your reference. As shown in the figure: Use a canned jar to punch a hole about 1.5 cm in diameter in the middle of the original iron lid and insert a small 50 ml Erlenmeyer flask. In order to facilitate insulation, a cardboard can be lined under the iron lid. The shredded cardboard and cardboard are placed on the bottom of the jar, which can insulate and fix the Erlenmeyer flask and are insulated by air. This device is designed to facilitate observation of the liquid level and reaction conditions during the experiment. The thermometer is fixed with a rubber stopper