Question

the surface tension of the alcohol propanol in air has a value of 23.70 units and the surface tension of water in air is 72.80 units. which two statements are true? a. propanol will have a lower boiling point than water because the forces between the molecules are smaller. b. propanol will have a higher boiling point than water because the forces between the molecules are greater. c. propanol will have a flatter meniscus than water because the forces between the molecules are smaller. d. propanol will have a more curved meniscus than water because the forces between the molecules are greater.

Explanation:

Surface tension is related to the intermolecular forces. Lower surface - tension indicates weaker intermolecular forces. Weaker intermolecular forces lead to a lower boiling point as less energy is needed to separate the molecules. Also, weaker intermolecular forces result in a flatter meniscus as there is less of a pull to create a curved surface. Propanol has lower surface - tension than water, so it has weaker intermolecular forces.

Answer:

A. Propanol will have a lower boiling point than water because the forces between the molecules are smaller.
C. Propanol will have a flatter meniscus than water because the forces between the molecules are smaller.