Effect of H/D-isotope substitution on the solubility and solvation thermodynamics of krypton in methanol solutions of carbamide |
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| Authors: | Ivanov E V Ivanova N G Abrosimov V K Lebedeva E Yu |
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| Institution: | (1) Institute of Solution Chemistry, Russian Academy of Sciences, 1 ul. Akademicheskaya, 153045 Ivanovo, Russian Federation;(2) Ivanovo State Power University, 34 ul. Rabfakovskaya, 153003 Ivanovo, Russian Federation |
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| Abstract: | The solubility of gaseous krypton in CO(NH2)2—CH3OH (CD3OH) and CO(ND2)2—CH3OD solutions with carbamide concentrations of up to 1.5 solvomolality units ( 0.026 mole fractions) was measured at 278, 288, 298, 308, and 318 K and at a partial gas pressure of 101325 Pa. The thermodynamic functions of dissolution (solvation) of krypton and the standard Setchenov coefficients were calculated. The solvation of Kr molecules increases upon deuterium substitution and with an increase in the temperature and carbamide concentration. In these solutions, specific contacts between the carbamide and methanol molecules play the predominant role. |
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| Keywords: | carbamide krypton methanol solubility isotope effects solvation thermodynamic functions |
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