Heterogeneous nucleation:
A)cannot occur in the presence of hygroscopic particles.
B)can only occur at humidities in excess of 100 percent.
C)results in a water droplet that is 100 percent water.
D)requires condensation nuclei.

Question

Quizplus · Accepted Answer

Heterogeneous nucleation requires condensation nuclei, which are small particles that serve as a surface for water vapor to condense onto. Without these particles, homogeneous nucleation would occur, which requires much higher levels of humidity to form droplets. Hygroscopic particles, which absorb moisture from the air, can actually enhance heterogeneous nucleation by providing more sites for condensation to occur. The resulting droplets may not necessarily be 100 percent water, as they can contain dissolved gases or other substances depending on the composition of the condensation nuclei.

Heterogeneous Nucleation