I don't understand this Vapor Concept problem?

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The discussion revolves around solving a vapor concept problem involving the volume of oxygen gas under different conditions of temperature and pressure. Participants clarify that the volume of a gas is influenced by pressure and temperature, referencing the ideal gas law. One user attempts to apply the formula (P1V1)/T1=(P2V2)/T2 to find the new volume but struggles with calculations. Another participant suggests that the initial equation mentioned, P1+P2+P3=Ptotal, is not applicable and resembles Dalton's law instead. The conversation highlights the importance of accurate calculations in applying gas laws.
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Homework Statement



If oxygen gas occupies 25mL at -25 'C and 65 mm Hg.
What is the volume at 25 'C and 350 mmHg?

Homework Equations



P1+P2+P3=Ptotal

The Attempt at a Solution


I am really not sure how to do this :(
I think maybe I figured it out. Please see below!
 
Last edited:
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I don't understand P1+P2+P3=Ptotal.

The volume of a gas changes, depending on pressure and temperature. Do you know a law that describes this? (It is a law that describes an ideal gas)
 
The ideal gas law equation

Ok I think I might have the answer this is what I cam up with but I am not sure...
Here it is:

25mL/248K = X/298K

Which equals 30.04mL (I still don't believe this is right)
 
Last edited:
Mackydoodle said:
P1+P2+P3=Ptotal

Mackydoodle said:
The ideal gas law equation

It has nothing to do with the ideal gas equation. If anything, it looks like Dalton's law.

Ok I think I might have the answer this is what I cam up with but I am not sure...
Here it is:

(P1V1)/T1=(P2V2)/T2

V2=(65x25x318) / (350x248) = 4.2

Correct approach, but you need to hone your calculator skills.
 
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