Question

A sample of CO2 is collected over water at 23oC. If the total pressure of the sample is 734 torr, and the vapor pressure of water at 23oC is 21.2 torr, what is the partial pressure of CO2 in torr? DON"T WRITE THE UNITS: ONLY THE VALUES.

Answer 1

Answer: The partial pressure of carbon dioxide is 712.8

Step-by-step explanation:

Dalton's law of partial pressure states that the total pressure of the system is equal to the sum of partial pressure of each component present in it.

To calculate the partial pressure of carbon dioxide gas, we use the law given by Dalton, which is:

`P_T=p_(CO_2)+p_(H_2O)`

We are given:

Total pressure,
`P_T` = 734 torr

Vapor pressure of water,
`p_(H_2O)` = 21.2 torr

Putting values in above equation, we get:

`734=p_(CO_2)+21.2\\\\p_(CO_2)=734-21.2=712.8torr`

Hence, the partial pressure of carbon dioxide is 712.8