摘要
探讨了利用氧弹量热计测定固体物质分解焓的方法,准确称取一定量的固体样品和基准物质,均匀混合后压片,放入氧弹量热计燃烧,记录燃烧前后时间和氧弹量热计温度变化数据。采用雷诺温度校正曲线法,求出样品燃烧前后系统温度的变化值,用盖斯定律计算出固体物质的分解焓。通过测定碳酸钙的分解焓,结果的相对误差为2.74%,在允许的误差范围内,且方法简单,重现性好,准确度高,说明用此方法测定固体物质的分解焓是可行和可靠的。
This paper discussed the determination method of solid decompound enthalpy with oxygen bomb calorimeter. After thc solid sample and standard substance were accurately quantified and uniform mixed, and the pressed piece was put into the oxygen bomb and combustion. These record of time and the change of calorimeter temperature, adopt Reynolds temperature correction to evaluate the change of calorimeter temperature ,calculate the decompound enthalpy of solid. Based on the decompound enthalpy of calcium carbonate, the results showed the relative error less then 2.74% , within the allowable error. By this method,which is simple, highly repeatability and accuracy. So the determination method of solid decompound enthalpy with oxygen bomb combustion is feasible and reliable.
出处
《应用化工》
CAS
CSCD
2006年第9期723-726,共4页
Applied Chemical Industry
关键词
碳酸钙
分解焓
氧弹量热计
calcium carbonate
decompound enthalpy
oxygen bomb calorimeter
