Question
An expression for one of these quantities is obtained by differentiating the virial expansion of excess Gibbs free energy with respect to molality in the Pitzer equations. For 10 points each:
[10m] Name these dimensionless quantities that may be calculated from a sum of combinatorial and residual contributions in the UNIQUAC model.
ANSWER: activity coefficients
[10e] The Guggenheim-Staverman correction to the combinatorial contribution shifts it to more closely model solutions described by this adjective. Other substances described by this adjective can be modeled by a combination of Charles’ law, Boyle’s law, and Avogadro’s law.
ANSWER: ideal solution [accept word forms; accept ideal gas or ideal gasses]
[10h] When describing vapor-liquid phase equilibria, UNIQUAC is outclassed by a model that appends the acronym SPACE to the name of this model. As its name implies, this model treats solvents as ideal conductors.
ANSWER: COSMO [or COnductor-like Screening MOdel; accept COSMOSPACE]
<Omer, Chemistry>
Summary
| 2024 ESPN @ Brown | 04/06/2024 | Y | 3 | 13.33 | 67% | 67% | 0% |
| 2024 ESPN @ Cambridge | 04/06/2024 | Y | 2 | 10.00 | 100% | 0% | 0% |
| 2024 ESPN @ Chicago | 03/23/2024 | Y | 6 | 13.33 | 100% | 33% | 0% |
| 2024 ESPN @ Columbia | 03/23/2024 | Y | 7 | 17.14 | 100% | 57% | 14% |
| 2024 ESPN @ Online | 06/01/2024 | Y | 4 | 15.00 | 100% | 50% | 0% |
Data
| Labour's Lost Lovers | Clark A | 10 | 10 | 0 | 20 |
| Clark B | Jason Lovers | 0 | 0 | 0 | 0 |
| Triple Round Robin Lovers | Jeffrey and Dahmers | 10 | 10 | 0 | 20 |