The boiling points of , , and are , , and , respectively. Which of the following will have the highe — Solutions and Colligative Properties Chemistry Question
Question
The boiling points of $\text{C}_6\text{H}_6$, $\text{CH}_3\text{OH}$, $\text{C}_6\text{H}_5\text{NH}_2$ and $\text{C}_6\text{H}_5\text{NO}_2$ are $80^\circ\text{C}$, $65^\circ\text{C}$, $184^\circ\text{C}$ and $212^\circ\text{C}$, respectively. Which of the following will have the highest vapour pressure at the room temperature?
Answer: B
💡 Solution & Explanation
Vapour pressure is inversely proportional to the boiling point of a liquid. A liquid with a lower boiling point has weaker intermolecular forces and thus a higher vapour pressure at a given temperature. $\text{CH}_3\text{OH}$ has the lowest boiling point ($65^\circ\text{C}$). Therefore, correct answer is B.
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