Question
An extended form of this model adds an extended Debye-Hückel contribution to the combinatorial and residual terms. For 10 points each:
[10h] Name this model used to quantify the excess Gibbs free energy of a liquid mixture. Unlike a similar model with 6 letters in its abbreviated name, this model requires parameters for every compound and interaction to be specified.
ANSWER: UNIQUAC model [or universal quasichemical model; reject “UNIFAC” model or “UNIQUAC functional-group activity coefficients” model]
[10m] The UNIQUAC model enables the calculation of these dimensionless quantities from the excess Gibbs free energy. These quantities measure the deviation of a solution from ideality.
ANSWER: activity coefficients [prompt on gamma; prompt on activity or activities]
[10e] In the UNIQUAC model, the combinatorial term is not dependent on this quantity and only depends on the size of the participating species. According to the ideal gas law, PV equals nR times this quantity.
ANSWER: temperature [or T]
<Alex Li, Chemistry>
Summary
| 2024 Penn Bowl CWRU | 11/02/2024 | Y | 1 | 20.00 | 100% | 100% | 0% |
| 2024 Penn Bowl Chicago | 11/02/2024 | Y | 1 | 20.00 | 100% | 100% | 0% |
| 2024 Penn Bowl Texas | 11/02/2024 | Y | 1 | 20.00 | 100% | 100% | 0% |
Data
| Michigan A | Carnegie Mellon | 0 | 10 | 10 | 20 |