Question

To what temperature should water be heated so that its vapor pressure equals the vapor pressure chloroform at ${40}^{o}C$?

• A. ${40}^{o}C$
• B. ${50}^{o}C$
• C. ${60}^{o}C$
• D. ${70}^{o}C$
• E. ${80}^{o}C$

Answer 1

Answer: (E)

${80}^{o}C$

To ${80}^{o}C$ should water be heated so that its vapor pressure of water equals the vapor pressure chloroform at ${40}^{o}C$.

The vapor pressure chloroform at ${40}^{o}C$ is around 55 kPa. Water has a vapour pressure of 55 kPa at around ${80}^{o}C$.