A sample of nitrogen gas is collected over water at a temperature of 23.0°C. What is the pressure of nitrogen gas if atmospheric pressure is 785 mm Hg?
The saturated vapour pressure of water at
Gas collected over water must always account for the saturated vapour pressure. I have included a link to a Table, but in an exam these data would be supplied.
Note that when a gas is collecgted over water, we must always include