A sample of air at 21°C has a relative humidity of 58%. At what temperature will water begin to condense as dew? (See Problem 11.97.)
Problem 11.97
The percent relative humidity of a sample of air is found as follows: (partial pressure of water vapor/vapor pressure of water) ×100. A sample of air at 21°C was cooled to 15°C, where moisture began to condense as dew. What was the relative humidity of the air at 21°C?