Finding the volume of hydrogen
A hydrogen filled balloon of the type used in cosmic ray studies is to be expanded to its full size which is a 100-ft diameter sphere, without stress in the wall at an altitude of 150,000 ft. If the pressure and temperature at this altitude are 0.14 psia and -67 degrees F respectively,
Find the volume of hydrogen at 14.7 psia and 60 degrees F that should be added on the ground. Neglect the balloon's weight