# An expandable balloon filled with 100.0 L of helium at 750 torr and 20°C is launched from ground level. No gas is added or removed from the balloon during its flight. Calculate its volume at an altitude of 10 km, where the temperature and pressure in the balloon are 2.0°C and 190 torr, respectively.

Question

An expandable balloon filled with 100.0 L of helium at 750 torr and 20°C is launched from ground level. No gas is added or removed from the balloon during its flight. Calculate its volume at an altitude of 10 km, where the temperature and pressure in the balloon are 2.0°C and 190 torr, respectively.