Question

1. how can you experimentally determine the relative evaporation rates of different liquids? observe the time it takes for a set volume of each liquid to evaporate completely measure the change in mass of each liquid over time compare the boiling points of the liquids none of the above

Explanation:

Step1: Recall evaporation concept

Evaporation is a surface - level phase transition from liquid to gas. To determine relative evaporation rates, we measure the change in mass of a liquid over time as the liquid evaporates.

Step2: Analyze options

Comparing boiling points (option 1) is related to the transition from liquid to gas at the boiling temperature, not surface - level evaporation. Measuring the time for a set volume to evaporate completely (option 2) is less accurate as it doesn't account for mass changes over time in a continuous way. Measuring the change in mass of each liquid over time (option 3) is the correct way to determine relative evaporation rates.

Answer:

Measure the change in mass of each liquid over time