Pressure and force

  • #1
itsascience
2
0
Hello, I am studying for an exam that I am taking in January, and I am doing practice problems. I have not taken physics in over 2.5 years... and I don't remember half of it pretty much. I'm trying to learn it again as I practice.

Homework Statement


Here is the problem:
There is a 1 cubic meter container filled with 4 gases: He, O2, CO2, N2. There are equal molar quantities of all 4 gases, and are assumed to be ideal. The pressure inside is 1 atm, or 10^5 Pa. The temperature is 25 degrees C.
What I want to know is, does the partial pressure of each gas increase at different rates? Or does the partial pressure of the gases increase at the same rate... If they are different, does it depend on the size of the gas molecule?
Actually, I'm not sure if this should be in physics section or in the chemistry section.


Homework Equations



Honestly I don't even know.

The Attempt at a Solution



I tried reading about partial pressures, but could not find anything relevant :/
 

Answers and Replies

  • #2
Borek
Mentor
29,172
3,847
What do you mean by "pressure increase rate"? What force is behind this pressure increase?

I suppose you mean something like "do all partial pressures go up at the same time if we heat the mixture?" If so the answer is yes, each gas behaves ideally independent of what other gases do.
 
  • #3
itsascience
2
0
Thank you Borek!
Yes that is what I meant.
The temperature was increased from 25C to 50C.

---

Now I'm up to a problem that deals with FM radio waves and the magnetic field generated by the waves... :/
I have to relate the direction of the magnetic field that accompanies the FM signal. I definitely did not learn this in my physics courses.
I know that FM radiowaves are electromagnetic, they have a certain frequency and an amplitude. But I do not know anything about the magnetic field caused by it... :(

---

Ok so I found out that the magnetic field is perpendicular to the radio wave.
 
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