Berman H A, Newman E S
J Res Natl Bur Stand A Phys Chem. 1961 May-Jun;65A(3):197-207. doi: 10.6028/jres.065A.023. Epub 1961 Jun 1.
The heat of formation of 3CaO·AlO·CaCO·10.68HO at 25 °C was determined by the heat-of-solution method, with 2 HCl as the solvent and 3CaO·AlO·6HO and CaCO as the reactants. The heat of solution of CaCO, to form dissolved CO, was obtained by a new technique and a modified calculation which served to include the heat of vaporization of the gas escaping in the reaction and resulted in a higher value than those obtained by Wells and Tayıor and by Bäckström in determinations representing only partial solution of CO. The results obtained were: 3CaO·AlO·CaCO·10.68HO Heat of formation from elements, -1956 from reactants and HO-18.9 Heat of solution in 2 HCl-532.9-127.43CaO·AlO·6HO Heat of solution in 2 HCl-576.6-137.8CaCO Heat of solution in 2 HCl-35.0-8.4.
采用溶解热法，以2HCl为溶剂，3CaO·Al₂O₃·6H₂O和CaCO₃为反应物，测定了3CaO·Al₂O₃·CaCO₃·10.68H₂O在25℃时的生成热。CaCO₃生成溶解态CO₂的溶解热是通过一种新技术和改进的计算方法获得的，该方法考虑了反应中逸出气体的汽化热，得到的值高于Wells和Tayıor以及Bäckström仅代表CO₂部分溶解的测定结果。得到的结果如下：3CaO·Al₂O₃·CaCO₃·10.68H₂O 生成热 由元素生成 -1956 由反应物和H₂O生成 -18.9 在2HCl中的溶解热 -532.9 -127.4 3CaO·Al₂O₃·6H₂O 在2HCl中的溶解热 -576.6 -137.8 CaCO₃ 在2HCl中的溶解热 -35.0 -8.4 。
