Question
This quantity equals the slope of log-log plots of rate vs. concentration. For 10 points each:
[10e] Name this quantity, defined as the exponent of a species’ concentration in a rate law. The half-life of a reaction is constant when this quantity equals 1.
ANSWER: reaction order [or order of reaction]
[10h] This mechanism explains why unimolecular reactions are second-order at sufficiently low pressures using collisions between A, A-star, and M. This mechanism is commonly used to model gas phase decomposition reactions.
ANSWER: Lindemann mechanism [or the Lindemann–Christiansen mechanism or the Lindemann–Hinshelwood mechanism]
[10m] The derivation of the rate law in the Lindemann mechanism can be simplified by using this approximation, which in this case assumes that the intermediate A-star is produced and consumed at the same rate.
ANSWER: steady-state approximation [or SSA; accept quasi-steady-state approximation or QSSA]
<Science - Chemistry>
Summary
| 2024 ARGOS @ Brandeis | 03/22/2025 | Y | 3 | 6.67 | 33% | 33% | 0% |
| 2024 ARGOS @ Christ's College | 12/14/2024 | Y | 3 | 16.67 | 67% | 100% | 0% |
| 2024 ARGOS @ Stanford | 02/22/2025 | Y | 3 | 20.00 | 67% | 100% | 33% |
| 2024 ARGOS Online | 03/22/2025 | Y | 3 | 6.67 | 33% | 33% | 0% |
Data
| Cien Años de Quizboledad | Cambridge | 10 | 0 | 10 | 20 |
| Simple Vibes | Grzegorz Brzęczyszczykiewicz | 10 | 0 | 10 | 20 |
| Limp Franceskit | Defying Suavity | 0 | 0 | 10 | 10 |