Asked by Tyran

A 32.0 mL sample of hydrogen is collected over water at 20.0 degrees celcius and 750.0 torr. What is the volume of the dry gas at STP?
Answered by Tyran
I forgot to add-- Vapor pressure of water at 20.0 degrees celcius is 17.5 torr.
Answered by DrBob222
(P1V1)/T1 = (P2V2/T2)
P1 = 750 torr - vapor pressure H2O @ 20 degrees Celsius (note the correct spelling of Celsius).
V1 = 32 mL
T1 = change C to Kelvin.
P2 and T2 are STP; i.e., 760 torr and 273 K.
Post your work if you get stuck.
Answered by Tyran
What do you mean by P1, meaning 750 torr - vapor pressure H2O @ 20 degrees Celsius?
Answered by DrBob222
750 torr - 17.5 torr = ?? torr = P1.
According to Dalton's Law of Partial Pressure, the total pressure is the sum of the partial pressures in the gas.
P(gas) + P(water) = total P = 750 torr. That's what you started with in the problem.
Answered by Monika
i don't understand the P2 and T2 part with the STP
Answered by Jeril
No
Answered by SYG
29.4 mL
There are no AI answers yet. The ability to request AI answers is coming soon!