## Partial Pressures for Different Temperatures

Harmony Becerra
Posts: 32
Joined: Sun Jan 21, 2018 3:00 am

### Partial Pressures for Different Temperatures

For 5G.9 it asks whether the partial pressures will be the same in both containers when the second container has a higher molarity. I have the answer key and it says the partial pressures will be different, but I don't understand why. If each container is held at the same temperature, wouldn't the partial pressures stay the same? Or does it change because the molarity changes, and if so, why?

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Joined: Fri Sep 28, 2018 12:16 am
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### Re: Partial Pressures for Different Temperatures

In the second container, since the concentration of O2 is greater the partial pressure is greater. Pressure and concentration are directly proportional as shown by P=(conc.)RT, so if concentration is greater, then pressure is also greater (given that T is the same).

Anusha 1H
Posts: 65
Joined: Fri Sep 28, 2018 12:15 am

### Re: Partial Pressures for Different Temperatures

Molarity and Partial Pressure are directly related.
We can tell from PV=nRT when the equation is written
- (n/V) = P/(RT) or
- concentration = P/(RT)
that when the pressure increases the concentration will also increase.