Determination of Equilibrium Constants for Reactions between Nitric Oxide and Ammoniacal Cobalt(II) Solutions at Temperatures from 298.15 to 309.15 K and pH Values between 9.06 and 9.37 under Atmospheric Pressure in a Bubble Column
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Bibliographic record
Abstract
Experiments were conducted in a bubble column to determine the equilibrium constants of reactions between NO and ammoniacal cobalt(II) solutions at temperatures between 298.15 and 310.15 K and pH values from 9.06 to 9.37 under atmospheric pressure. The two reactions are 2Co(NH 3 ) 5 (H 2 O) 2+ + 2NO ⇌ (NH 3 ) 5 Co(N 2 O 2 )Co(NH 3 ) 5 4+ + 2H 2 O and 2Co(NH 3 ) 6 2+ + 2NO ⇌ (NH 3 ) 5 Co(N 2 O 2 )Co(NH 3 ) 5 4+ + 2NH 3, respectively. Their equilibrium constants are calculated on the fraction molar basis. All experimental data fit well to the equations ln K NO 5 = 3598.5(1/ T ) + 16.759 and ln K NO 6 = 1476.4(1/ T ) + 26.597, which give the enthalpy of reactions between NO and penta- and hexaamminecobalt(II) nitrates: Δ r H 5 ° = −29.92kJ·mol –1 and Δ r H 6 ° = −12.27kJ·mol –1 .
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| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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