Question

Identify two common observations indicating some liquids have sufficient vapor pressures to noticeably evaporate.

a) Formation of fog
b) Condensation on a cold surface
c) No observable change
d) Decrease in temperature

Choose all correct options:

A. a and b
B. b and c
C. a and c
D. c and d

Answer 1

Two common observations indicating that some liquids have sufficient vapor pressures to noticeably evaporate are the formation of fog and condensation on a cold surface.

Step-by-step explanation:

Two common observations indicating that some liquids have sufficient vapor pressures to noticeably evaporate are:

1. Formation of fog: When water vapor in the air cools enough to form liquid water droplets, it creates fog. This is a visible indication of evaporation.
2. Condensation on a cold surface: When water vapor comes into contact with a cold surface, it condenses and forms water droplets. This condensation is a result of evaporation from the liquid into the gas phase.