A sample of CO₂ is collected over water at 23$\degree$C.If the total pressure of the sample is 734 torr, what is the partial pressure of the CO₂? The vapor pressure of water at 23$\degree$C is 21.2 torr.

Question

Quizplus · Accepted Answer

To solve this problem, we need to use Dalton's Law of Partial Pressures, which states that the total pressure of a gas mixture is equal to the sum of the partial pressures of each gas in the mixture. First, we need to find the partial pressure of water vapor in the sample. We are given that the vapor pressure of water at 23°C is 21.2 torr, so this is the partial pressure of water vapor in the sample. To find the partial pressure of CO₂, we can subtract the partial pressure of water vapor from the total pressure: Partial pressure of CO₂ = Total pressure - Partial pressure of water vapor Partial pressure of CO₂ = 734 torr - 21.2 torr Partial pressure of CO₂ = 712.8 torr Therefore, the answer is C) 713 torr, which is the closest choice to our calculated value of 712.8 torr.

A Sample of CO2 Is Collected Over Water at 23 °\degree°

A Sample of CO₂ Is Collected Over Water at 23 $\degree$