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)