用于测定中和焓的低成本量热计的构建

Q3 Physics and Astronomy Ecletica Quimica Pub Date : 2018-01-16 DOI:10.1590/S0100-46702010000200007

M. Assumpcao, Luciani Wolf, Viviane Gomes Bonifácio, O. Fatibello-Filho

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引用次数: 2

摘要

本文介绍了一种简单的量热计（用容易获得的材料）的结构，用于测定酸碱反应恒压下的中和焓。实验开发中使用了弱酸和强碱溶液、一个温度计和一个发泡聚苯乙烯（泡沫塑料）容器。使用该量热计，可以确定反应的中和焓，并将获得的值与25°C下最公认的值-55.84 kJ mol-1进行比较[1]。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Construção de um calorímetro de baixo custo para a determinação de entalpia de neutralização

In this article the construction of a simple calorimeter (with easily acquired materials) for the determination of the enthalpy of neutralization at constant pressure of acid-base reactions is described. Solutions of weak and strong acids and bases, one thermometer, and one expanded-polystyrene (Styrofoam) container were used in the development of the experiment. With this calorimeter, it was possible to determine the enthalpy of neutralization of reactions and compare the obtained values with the most accepted one of - 55.84 kJ mol-1, at 25 Â° C [1].

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