The atmospheric pressure in Denver is 640.0 mmHg. What would be the boiling point of water in that city?

Answer 1

Water boils at 100 ^oC, when the atmospheric pressure equals 760 mmHg. A liquid boils when the atmospheric pressure equals its vapor pressure. The atmospheric pressure in Denver is 640.0 mmHg is lower than 760 mmHg. Boiling point of water in Denver is lower than 100 ^oC, because water only needs to build lower vapor pressure while heating. As long as the vapor pressure equals 640.0 mmHg, water boils.