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# Can someone explain how tf to work this out watch

1. When 2.0moles of a gas mixture at 1atm1atm and 296K is compressed to half its original volume, the temperature rises to 312K and the pressure rises to 1.7atm. Some of the gas slowly leaks out during compression. Calculate the amount of gas present in the smaller volume.
2. (Original post by AzzyArslan)
When 2.0moles of a gas mixture at 1atm1atm and 296K is compressed to half its original volume, the temperature rises to 312K and the pressure rises to 1.7atm. Some of the gas slowly leaks out during compression. Calculate the amount of gas present in the smaller volume.
You have no ideas?
3. (Original post by AzzyArslan)
When 2.0moles of a gas mixture at 1atm1atm and 296K is compressed to half its original volume, the temperature rises to 312K and the pressure rises to 1.7atm. Some of the gas slowly leaks out during compression. Calculate the amount of gas present in the smaller volume.
Well, start off by finding the original volume of the gas using pV=nRT. You know p, n, R (it's just a constant) and T.

Then find the number of moles in the final (compressed) gas, remembering to halve the volume.

If in doubt, write out what you know and what you're trying to find out. Really helps when dealing with complex formulae involving 4 or 5 variables.

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