19.58 ... High-Altitude Research. A large research balloon containing of helium gas at 1.00 atm and a temperature of 15.0°C rises rapidly from ground level to an altitude at which the atmospheric pres- sure is only 0.900 atm (Fig. P19.58). Assume the helium behaves like an ideal gas and the balloon’s ascent is too rapid to permit much heat exchange with the surrounding air. (a) Calculate the

 19.58 ... High-Altitude Research. A large research balloon containing  of helium gas at 1.00 atm and a temperature  of 15.0°C rises  rapidly from ground level to an altitude at which the atmospheric pres- sure is only 0.900 atm (Fig. P19.58). Assume the helium behaves like an ideal gas and the balloon’s ascent is too rapid to permit much heat exchange with the surrounding air. (a) Calculate the volume of the gas at the higher altitude. (b) Calcu- late the temperature of the gas at the higher altitude. (c) What is the change in internal energy of the helium as the balloon rises to the higher altitude?