Water should boil at 90°C at pressure — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

The boiling point of a liquid is the temperature at which its vapour pressure equals the external atmospheric pressure. At 1 atm pressure, water boils at 100°C. If the external pressure is decreased (< 1 atm), the vapour pressure of water can equal the external pressure at a lower temperature (90°C).