【摘要】 基于基团贡献法提出易燃液体燃烧热的计算方法。以8种典型易燃液体为对象,估算物质的标准摩尔生成焓和摩尔定压热容,根据物质燃烧的反应公式,计算物质燃烧反应的标准摩尔反应焓;经过温度和压力换算,求解其燃烧热,并利用氧弹量热仪进行实验验证。结果表明:样品燃烧热的实验值与计算结果吻合良好,验证了数值方法的可靠性。有机物燃烧热随碳原子数增加而增加,碳原子数相同的同类物质中直链结构有机物燃烧热要稍高于支链结构的燃烧热。更多还原

【Abstract】 Based on the group contribution method, a numerical model which simulates the combustion heat of flammable liquid was proposed. By estimate standard molar enthalpy of formation and molar heat capacity at constant pressure, based on the reaction formula for material combustion, the standard molar enthalpy of combustion reaction of 8 typical flammable liquid was calculated.Combustion heat were calculated by conversion of temperature and pressure, and then experimentally measured by Oxygen bomb calorimeter.The results showed that the experimental values of these samples agree well with the calculated results, and the reliability of the numerical method was verified. The combustion heat of organic matter increases with the increasing of the number of carbon atoms, and the combustion heat of the linear structure is slightly higher than that of the branched structure when the number of carbon atoms is the same.更多还原