Vapour PressureSolutions
How does Vapour Pressure change if the volume of the container is suddenly reduced to half or doubled (at constant T)?
Expert Answer
It remains Unchanged. Vapour pressure depends only on temperature, not on the volume of the container or the amount of liquid/vapour (provided some liquid remains). Mechanism: If volume is halved, vapour condenses to maintain constant Pressure. If volume is doubled, more liquid evaporates to restore constant Pressure.