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Checking How a Model Adhesive Separates 4 questions
Checking How a Model Adhesive Separates
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A museum tests removable labels on two smooth surfaces. The labels have the same backing, adhesive, and width. When a label separates at the wall, nearly all adhesive stays on its backing. When the adhesive tears within itself, some adhesive stays on both surfaces.
| Wall sample | Peel force (N) | Adhesive on backing after test | Adhesive on wall after test |
|---|---|---|---|
| P | 2.0 | Nearly all | None visible |
| Q | 4.0 | Some | Some |
Question 1
Which observation best supports separation within the adhesive on Q?
- The same adhesive is used on P and Q.
- Q takes 4.0 N to peel.
- Adhesive is left on both surfaces after peeling Q.
- No adhesive is visible on the wall after peeling P.
Question 2
Explain why the peel force alone cannot identify where a new label separated.
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The museum will use a label only if the peel force is at least 3.0 N and there is no visible residue on the wall.
Question 3
Use both requirements to decide whether P or Q qualifies.
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Question 4
Compare the new adhesive with the original adhesive on wall sample Q. Identify one variable to keep the same and both results the museum should record.
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