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@dmertl
Created May 22, 2013 08:50
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Balloon calculation
Weight difference: 3g
Aprox balloon weight: 1g
Total lift = 3g + 1g = 4g
Weight of air at STP: 1.20g/L
Weight of He at STP: 0.18g/L
He lift at STP = 1.2g/L - 0.18g/L = 1.02g/L
Volume of He = 4g / 1.02g/L = 4L
P * V = n * R * T
100kPa * 4L = n * 8.314LkPa/Kmol * 293K
n = 0.16mol
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