How does the density of vapor compare to air?

Vapor's density compared to air varies depending on the specific vapor being discussed, but generally, many industrial refrigerant vapors are heavier than air. This is important in refrigeration systems because if a refrigerant leak occurs, the heavier-than-air vapor can accumulate at lower levels, posing safety hazards.

When vapors are denser than air, they can displace oxygen in enclosed spaces, increasing risks of asphyxiation or other hazards. Understanding the density of vapors is critical for designing safety measures in industrial refrigeration environments, hence the emphasis on knowing how vapor behaves in relation to air.

While some vapors might be lighter or similar in density to air, the option discussing the density of vapor typically refers to common industrial refrigerants, which tend to be heavier, thus reinforcing the choice that they are heavier than air.