The vapour pressure vs. temperature curve for a solution solvent system is shown below.

The boiling point of the solvent is ______°C.

Looking closely at the two parallel liquid-gas equilibrium lines:

• The **Left-most Curve** represents the pure solvent.
• The **Right-most Curve** represents the solution (due to vapor pressure lowering).

Follow the horizontal dashed reference line originating from 1 atm on the vertical axis:

• It intersects the pure solvent curve (left curve) first. Dropping straight down to the temperature axis from this intersection point reads exactly 82°C.
• It intersects the solution curve (right curve) second. Dropping down to the temperature axis from this intersection point reads exactly 83°C..