1. (Li, Na, K)OH hydration bonding thermodynamics: Solution self-heating.
- Author
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Sun, Chang Q., Chen, Jiasheng, Yao, Chuang, Liu, Xinjuan, Zhang, Xi, and Huang, Yongli
- Subjects
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HYDRATION , *THERMODYNAMICS , *EXOTHERMIC reactions , *BOND order (Chemistry) , *ENDOTHERMIC reactions - Abstract
The resultant energy of solvent H–O bond exothermic elongation by O:⇔:O repulsion, featured at <3100 cm −1 , and the solute H–O bond endothermic contraction by bond-order-deficiency, at 3610 cm −1 , heats up the (Li, Na, K)OH solutions. The solution temperature increases linearly with the number fraction of the ordinary O:H–O bonds transiting into their hydration states. The elongated H–O bond emits >150% the O:H cohesive energy of 0.095 eV that caps the energy dissipating by molecular motion, thermal fluctuation, diffusion, and even evaporation. Therefore, the intramolecular H–O bond relaxation dictates the OH − solvation bonding thermodynamics and the performance of basic solutions. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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