# Gas Circulation Using Pressure Difference

Dear all, see attached picture Please, is it possible to have the gas recirculated from the gas phase to the liquid as described in the diagram assuming the gas is not soluble in the water. These are the conditions. 1. The valve remained closed, 2. The liquid level didn’t change 3. P1 increases.

Could P1 get to a level where it would force itself through the pipe and go through the liquid. If P1 increases, what happens to P2.

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Please provide a link to the picture and somebody will edit your post to add it in. – Brandon Enright May 10 '13 at 18:04
I can,t add the DIagram, I keep getting, You need at least 10 reputation to post images. – Abiodun Jegede May 10 '13 at 18:07
You need at least 10 reputation to post images. I keep getting this message, I can't add the diagram, how can I solve that. – Abiodun Jegede May 10 '13 at 18:08
@AbiodunJegede Put the link of the picture if it's on an image hosting site. Otherwise, upload it to one, then post the link. Example of image posting site. – Jerry May 10 '13 at 18:18

In this case, $P_2 > P_1$. Therefore, of you look at the side tube, through which gas is supposed to flow, there is a pressure gradient that will oppose the flow of the gas.
But there is one more flaw in the experiment. The liquid itself will rise through the side tube to a height that matches the level in the main vessel. In that case, there will be same pressure, say $P_1^\prime$ at the surface of the liquid in the side tube and the main jar. In absence of a pressure gradient, there will be no flow either.