【摘要】 为了配合物理化学实验“凝固点降级法测定萘的摩尔质量”,研制出半导体制冷凝固点测定仪,实现了凝固点测定和摩尔质量计算的自动化,解决了老式实验装置存在的问题。通过对环己烷凝固点和萘摩尔质量的测定,验证了该仪器的可靠性,同时还探讨了搅拌速率和冷阱的温度变化对凝固点测定值的影响。更多还原

【Abstract】 For "determination of naphthalene molecular weight with freezing point depression" in physics chemistry experiment,the semi-conductor system cold freezing point measurement instrument was researched and manufactured.Automatic calculation and determination of molecular weight were carried out,and the existent problem in old style experiment equipment was overcame.By determining the freezing point of hexahydrobenzene and molecular weight of naphthalene,the instrument was validated to be dependable.The influence factors of freezing point with the speed of beater and refrigeration temperature were also discussed.更多还原