alleryStart learning →What name is given to the pressure exerted by one gas in a mixture?
AIts vapour pressure
BIts total pressure
CIts mole fraction
DIts partial pressure
Answer & Solution
Correct answer: D. Its partial pressure
1. Each gas in a mixture contributes its own share of the pressure on the container walls.
2. That share is called the partial pressure of the gas.
3. The mole fraction is a ratio of amounts and carries no units, so it is not a pressure at all.
4. Vapour pressure is a specific case, the pressure of a vapour in equilibrium with its own liquid.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 9 "Gases", section 9.3 Stoichiometry of Gaseous Substances, Mixtures, and Reactions_
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