What term describes a gas that does not condense into a liquid when its temperature is reduced?

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Multiple Choice

What term describes a gas that does not condense into a liquid when its temperature is reduced?

Non-condensable describes gases that do not condense into a liquid under the given cooling conditions. It’s about whether the gas remains in the vapor phase when temperature is lowered, under the system’s pressure and temperature range. These gases stay gaseous and can affect processes like condensation and heat transfer, which is why this term is used in practice.

A condensable gas would turn into a liquid if cooled enough. An inert gas relates to chemical reactivity rather than condensation behavior. A flammable gas concerns ignition risk, not whether it condenses.

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