A weather balloon contains an ideal gas and has a volume of 2.5 m^3 at launch, with a pressure of 101 kPa. As it rises slowly through the atmosphere, the gas temperature remains constant at 273 K.
(a) High in the atmosphere the pressure drops to 19.3 kPa. What is the volume of the balloon at that point?
Express your answer to two significant figures and include appropriate units.
(b) How much work is done by the gas in the balloon as it expands?
Express your answer to two significant figures and include appropriate units.
