Question

use the data to determine the strength of intermolecular forces present.
drag & drop the answer
note: use ctrl+d to drag the option via keyboard

Explanation:

Step1: Analyze the relationship between intermolecular forces and properties

Stronger intermolecular forces lead to higher melting points and more drops on a penny (due to higher surface tension related to intermolecular forces).

Step2: Compare the values

• For Unknown 1: Melting point \(- 29^{\circ}C\) and 17 drops.
• For Unknown 2: Melting point \(15^{\circ}C\) and 25 drops.
• For Unknown 3: Melting point \(-144^{\circ}C\) and 10 drops.
• For Unknown 4: Melting point \(25^{\circ}C\) and 33 drops.

Since Unknown 4 has the highest melting point and most drops, it has the highest intermolecular forces. Unknown 3 has the lowest melting point and fewest drops, so lowest intermolecular forces. Unknown 2 is in the middle - higher than Unknown 1 but lower than Unknown 4. Unknown 1 is higher than Unknown 3 but lower than Unknown 2.

Answer:

	Strength of Intermolecular Force
Unknown 2	high
Unknown 3	low
Unknown 4	very high