Timeline for Solubility in different pressure conditions
Current License: CC BY-SA 4.0
9 events
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| May 12, 2019 at 23:22 | comment | added | MaxW | @TreyAnupong - Yes, but using Henry's Law the water itself should contain 4 times as much oxygen when the pressure is 4 atm as it does when the oxygen has a pressure of 1 atm. So 28 ml of 1 atm gas dissolve into the water, and 28 ml of 4 atm gas dissolve into the water. | |
| May 12, 2019 at 19:08 | comment | added | Trey Anupong | Sorry if my question is amateur, why would we only set the volume constant though? If we keep the mass of gas constant, the volume would now decrease. For example, if 28 mL oxygen gas at 1 atm contains X grams of gas, then for the same amount (X g) 7 mL of gas at 4 atm could be dissolved in water. | |
| May 12, 2019 at 18:58 | comment | added | MaxW | @TreyAnupong - That's the point. If 18 ml oxygen gas at 1 atm contains X grams of gas, then 18 ml of gas at 4 atm contains 4X grams of gas. So 4 times as much pressure, 4 times as much mass per volume in the gas. | |
| May 12, 2019 at 18:49 | comment | added | Trey Anupong | Let me reiterate your point again. If we increase the pressure, the solubility as in grams or moles would increase but not for volume. Please correct me if I am not on the right track. How does this link to Boyle's law though? Since Boyle's law state that pressure is inversely proportional to the volume, providing that other variables are constant. This means volume would decrease if we increase the pressure. | |
| May 12, 2019 at 18:14 | comment | added | MaxW | @Delta_G - ah ha! I half-read the problem and was just thinking about the fact that the water would contain four times as much oxygen. But you are absolutely right. If at 1 atm of oxygen 28 ml of oxygen gas dissolves, then when you increase the pressure to 4 atm, then 28 ml of the 4 atm oxygen gas will dissolve too. So 4 times as much oxygen in the water, but only 28 ml of the gas phase dissolves in either case. // Thank you for the correction! | |
| May 12, 2019 at 18:13 | history | edited | MaxW | CC BY-SA 4.0 |
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| May 12, 2019 at 17:57 | comment | added | Delta_G | Do we need to think about Boyle's law too? In the problem as written it gives the amount of oxygen in mL. At 4 times the pressure, the same volume of oxygen contains a lot more oxygen. | |
| May 12, 2019 at 15:56 | vote | accept | Trey Anupong | ||
| May 12, 2019 at 18:56 | |||||
| May 12, 2019 at 14:03 | history | answered | MaxW | CC BY-SA 4.0 |