论文标题
在负压下溶解盐对水异常的影响
Effect of dissolved salt on the anomalies of water at negative pressure
论文作者
论文摘要
在环境压力下向水中添加盐会影响其热力学特性。在低盐浓度下，诸如密度最大值之类的异常转移到较低的温度，而在足够大的盐浓度下，无法再观察到它们。在这里，我们研究了盐在负压下在纯水中观察到的盐的影响：沿相位沿相位的最小值的存在。我们比较了氯化钠水溶液的实验和仿真，其摩尔性约为$ 1.2 \，\ mathrm {mol \ \，kg^{ - 1}} $，达到了$ -100 \，\ mathrm {mpa} $的压力。我们还讨论了最小值在声速度中的起源，并强调了声速和密度异常的相对位置的重要性。
Adding salt to water at ambient pressure affects its thermodynamic properties. At low salt concentration, anomalies such as the density maximum are shifted to lower temperature, while at large enough salt concentration they cannot be observed any more. Here we investigate the effect of salt on an anomaly recently observed in pure water at negative pressure: the existence of a sound velocity minimum along isochores. We compare experiments and simulations for an aqueous solution of sodium chloride with molality around $1.2\,\mathrm{mol\,kg^{-1}}$, reaching pressures beyond $-100\,\mathrm{MPa}$. We also discuss the origin of the minima in the sound velocity and emphasize the importance of the relative position of the temperatures of sound velocity and density anomalies.
