A gas will turn back into a liquid faster if the temperature of the gas is decreased.

Quick Scoop

When the temperature of a gas is decreased, the particles lose kinetic energy and move more slowly. This makes it easier for attractive forces between particles to pull them together into the liquid state, so condensation happens more quickly.

In everyday life, this is why you see water droplets form faster on a very cold surface (like a chilled drink can) than on a warm one: the moist air near the cold surface cools down, and the water vapor condenses rapidly back into liquid.

In short: for “a gas will turn back into a liquid faster if the temperature of the gas is... what?”, the answer is: decreased.

TL;DR: Lower (decreased) gas temperature → faster condensation into liquid.

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