|Oct5-07, 09:08 PM||#1|
Partial pressure question
A sample of oxygen is collected in a 172 mL
container over water at 15C, and the barom-
eter reads 754 torr. What volume would the
dry gas occupy at 778 torr and 15C? Water's
partial pressure at 15C is 12:8 torr. Answer
in units of mL.
2)attempt to answer:
I'm not exactly sure if this is the right way to do it since the question's wording is a bit confusing and there seems to be some useless information. Can anyone tell me if my answer is right here?
|Oct6-07, 09:06 AM||#2|
you need to SUBTRACT the partial pressure of water from the first pressure of 754 torr. (wet gas to dry gas) This is now p1, v1 = initial volume. P2 is the new pressure 778. find V2
|Oct6-07, 09:31 AM||#3|
thanks! i understand now!
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