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Assuming both balloons were both inflated to the same volume:The first balloon inflated at sea level would expand at the top of mt Everest because the air pressure is higher at sea level than it is at high altitude, the air is not pushing on the outside of the balloon as much as it was at sea level while the pressure inside the balloon remains constant, and so the volume increases.The second balloon inflated at altitude and brought to sea level would decrease in volume due to increasing air pressure i.e having the opposite effect that the first balloon experienced.
If the initial state is p1V1 and the volume changes isothermally to V2, the energy change is p1V1ln(V2/V1)
OK. So my next question is would there be a change in the energy of the gas molecules in each balloon and by how much.
PV = nRTn*R doesn't vary.Pressure will vary.Pressure at sea level: 1 ATM (101.3 kPA)Pressure at Mt. Everest: 33.7 kPa or about 1/3 ATM.Temperature will also vary depending on your experimental design. I think the peak of Mt Everest is usually below freezing. At sea level, it will depend on where you are.However, it would be easiest to consider the temperature fixed, and just vary the pressure, in which the volume would be about 3x at the peak of Mt. Everest.For some balloons, the pressure to stretch the balloon may vary with the amount it stretches.If you do choose to add temperature into your equations, you need to convert it to Kelvin.Quote from: jeffreyH on 13/10/2013 00:01:47OK. So my next question is would there be a change in the energy of the gas molecules in each balloon and by how much.Hmmm....Thinking of how a refrigerator works, you fix the "energy" of the system. Compress (or liquefy) a gas, and the temperature of your sample increases. Reduce the pressure, and the temperature of your sample decreases. If you had the pressure/volume/temperature, you could tell if the system was gaining or loosing energy.
If one balloon was inflated at sea level and taken to the top of mount everest and the opposite procedure carried out on a second balloon what would the results be?
units for pressure 1 Pa= 1Nm^-2 units for volume m^3so units for pressurevolume would be NmThat's interesting
The temperature drop is about 6.5 degrees per 1000 metres of altitude. You can treat it as pretty close to linear for the first 10 or 15 Km or so.What are the units of PV?