Question
The temperature at which this process occurs is inversely proportional to molecular weight by the Flory–Fox equation. For 10 points each:
[10h] Polymers in a material can experience conformational changes in finite time after undergoing what process? This process corresponds to a "step" in the plot of a signal during differential scanning calorimetry.
ANSWER: glass transition [or the glass-liquid transition; prompt on descriptions of glass becoming rubbery or viscous or liquid or fluid or vice versa; accept glass transition temperature; prompt on second-order phase transition or answer indicating a phase change]
[10e] The glass transition causes an increase in a material's value of this quantity, the amount of energy it takes to raise a material's temperature by one degree.
ANSWER: heat capacity [or specific heat capacity or molar heat capacity; prompt on c; reject "heat"]
[10m] Above the glass transition temperature, rubber elastomers maintain a solid structure due to these bonds between polymer chains.
ANSWER: cross-links [or cross-linking or cross-linkages; prompt on links or linking or linkages; prompt on covalent bonds or covalent linkages]
<Science - Chemistry>
Data
| Team | Opponent | Part 1 | Part 2 | Part 3 | Total |
|---|---|---|---|---|---|
| Detroit Catholic Central A | Hunter A | 0 | 10 | 0 | 10 |
| Innovation Academy A | Fremd | 0 | 10 | 10 | 20 |
| Strake Jesuit A | Lexington | 0 | 10 | 10 | 20 |
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| 2025 PACE NSC | 06/07/2025 | Y | 3 | 16.67 | 100% | 67% | 0% |