Apparent molar volumes of isoprene and limonene in dense-phase CO2
Bibliographic record
Abstract
Apparent molar volumes were calculated from measured density differences (δΔρ = 0.01 – 2.90 kg m −3 , depending on compressibility) for subsaturated isoprene and limonene in CO 2 from T = 298 – 313 K and p = 8 – 13 MPa and used to fit a fluctuation solution theory equation with RMSD values of 58.5 and 177.8 cm 3 mol −1 , respectively. Apparent molar volume minima at supercritical temperatures were correlated to a compressibility Widom line. Literature vapour-liquid-equilibrium and solubility data were compared to values calculated using fluctuation solution theory equations. The fluctuation solution theory fit to apparent molar volumes calculated literature bubble points (AARD = 0.0031 – 0.0371) and solubility data (AARD 0.6991). Krichevskii parameters for each solute were compared to literature for other similar solutes. Fluctuation solution theory was deemed a good model to calculate the properties of dilute terpenes in CO 2 , especially in the near-critical region. • Measured apparent molar volumes of isoprene and limonene in near critical CO 2 . • Volumetric date used to fit to fluctuating solution theory and compared to literature data. • A volumetric Widom transition was observed at supercritical temperatures. • Fluctuating solution theory accurately predicted VLE and solubility values. • Krichevskii parameters were calculated for each system.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".