Cracking the SAT Chemistry Subject Test

Vapor
pressure:

•   molecules   of  liquid  escaping    into    gas phase   although

temperature of  the liquid  is  below   boiling point

More
volatile
liquid:

•   liquid  that    has higher  vapor   pressure

•   evaporates  more    readily when    temperature is  below   boiling

point   (compared   to  a   less    volatile    liquid)

Less volatile
liquid:

•   liquid  that    has lower   vapor   pressure

•   evaporates  less    readily when    temperature is  below   boiling point