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Thermodynamics Discussion

A tank of helium (He) gas, measuring 20 cm in diameter and 1.0 m in height, sits in your basement at a temperature of 66ºF. The pressure gauge (which measures the pressure in the tank over and above atmospheric pressure) reads 10,000 psi. You bring the tank to a carnival where the temperature is 98ºF. How many balloons of diameter 10 inches can you fill? Assume the balloons are spheres, the pressure inside each balloon is the same as that outside the balloon, and the atmospheric pressure at both the carnival and in your basement is 1013 hPa. (conversion factors: 69 hPa psi-1; 9 5 FC )32( ×−= oo ; 2.54 cm in-1)

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