# Which solution has the higher vapor pressure? (A) A solution that boils at 100^@ "C" (B) A solution that boils at -33^@ "C"

## $\left(A\right)$ A solution that boils at ${100}^{\circ} \text{C}$ $\left(B\right)$ A solution that boils at $- {33}^{\circ} \text{C}$

$A$ has the higher boiling point, so it is harder to vaporize, since you have to reach a higher temperature for the vapor pressure to equal the atmospheric pressure, which would be what makes the vaporization occur.
Since $A$ is harder to vaporize, it has the lower vapor pressure. Therefore, $B$ has the higher vapor pressure.