This graph shows how the vapor pressure of three liquids varies with temperature:

Use the graph to answer the following questions:

Which liquid is the most volatile?

most volatile:

choose one

Which is the least volatile?

least volatile:

What is the normal boiling point of each liquid?

Note: your answer must be within $1C$ of the exact answer to be graded correct.

orthoxylene:

pyridine:

octane: