Question
Rayleigh’s model of this process assumes that one phase is continually removed from the other with this technique’s “fractional” form. For 10 points each:
[10e] Name this separation technique that involves using a column and condenser to separate substances by boiling point.
ANSWER: distillation [accept fractional distillation; accept word forms like distilling]
[10h] Industrial distillations often incorporate this technique, where overhead vapors are cooled to a liquid and then returned to the main column.
ANSWER: reflux [accept reflux ratio; accept word forms like refluxing a reaction]
[10m] Distillation is used to separate this substance into light, medium, and heavy products, as well as residues like bitumen that are used to make asphalt. Naphtha is most typically produced by distilling this liquid.
ANSWER: crude oil [or petroleum; prompt on oil; reject “petrol”]
<Chemistry>
Summary
| 2024 ACF Fall at Cornell | fall | Y | 8 | 17.50 | 100% | 63% | 13% |
| 2024 ACF Fall at Ohio State | fall | Y | 8 | 20.00 | 88% | 88% | 25% |
| 2024 ACF Fall at Washington | fall | Y | 6 | 16.67 | 83% | 83% | 0% |
| 2024 ACF Fall at Georgia | fall | Y | 10 | 16.00 | 100% | 60% | 0% |
| 2024 ACF Fall at North Carolina | fall | Y | 9 | 18.89 | 100% | 78% | 11% |
| 2024 ACF Fall at Claremont Colleges | fall | Y | 5 | 18.00 | 100% | 80% | 0% |
| 2024 ACF Fall at Rutgers | fall | Y | 7 | 20.00 | 86% | 86% | 29% |
| 2024 ACF Fall at Illinois | fall | Y | 9 | 22.22 | 100% | 89% | 33% |