Anomalous Heat Capacities of Supercooled Water and Heavy Water
Anomalous Heat Capacities of Supercooled Water and Heavy Water
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DOI：
10.1126/science.181.4097.342
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发表时间：
1973-07
期刊：
影响因子：
56.9
通讯作者：
C. Angell;J. Tucker
中科院分区：
文献类型：
--
作者：
C. Angell;J. Tucker
乳化使水过冷至均匀成核温度成为可能。因此，水和氧化氘的热容已分别从各自的平衡熔点测定到-38°C和-34°C。采用了两种方法：漂移量热法和差示扫描量热法。两种方法都表明，在-20℃以下的恒压热容显著上升。这种明显的合作行为的迹象应该用来测试当前的水理论，最值得注意的可能是Ben-Naim和Stillinger的配对势模型。文中还提到了一些可能的气象意义。
Emulsification makes it possible to supercool water to the homogeneous nucleation temperature. Accordingly, the heat capacities of water and deuterium oxide have been determined from the respective equilibrium melting points to —38� and to —34�C, respectively. Two methods, drift calorimetry and differential scanning calorimetry, have been used. Both methods reveal a striking rise in the constant-pressure heat capacity below —20�C. This indication of an apparently cooperative behavior should serve to test current theories of water, most notably perhaps, the pair potential model of Ben-Naim and Stillinger. Some implications of possible meteorological significance are mentioned.