Question

evaporation rate to determine the strength of intermolecular forces. stronger intermolecular forces result in a lower vapor pressure and require more energy for the substance to boil. the data below shows the boiling point of four substances, all of which contain one hydrogen bond. what is the rank of intermolecular forces from weakest to strongest for the compounds? the table below: compound w, boiling point (°c) 78.4; compound x, boiling point (°c) 64.7; compound y, boiling point (°c) 117.7; compound z, boiling point (°c) 97.1. options: x < w < z < y; x < z < w < y; w < x < y < z; y < z < w < x

Explanation:

Step1: Relate boiling point to intermolecular forces

Stronger intermolecular forces → higher boiling point.

Step2: Order boiling points from lowest to highest

Boiling points: X(64.7) < W(78.4) < Z(97.1) < Y(117.7).

Step3: Map to intermolecular force strength

Lower boiling point = weaker forces, so order is X < W < Z < Y.

Answer:

X<W<Z<Y