Question

The saturation vapour pressure of water at 100°C is

• A. 739 mm of mercury
• B. 750 mm of mercury
• C. 760 mm of mercury
• D. 712 mm of mercury

Answer 1

Answer: (C)

760 mm of mercury

Answer 2

At boiling point saturation vapour pressure becomes equal to atmospheric pressure. Therefore, at 100°C for water. S.V.P. = 760 mm of Hg (atm pressure).