A balloon is filled with 6.5 L of helium gas at 25oC and 1.0 atm. What volume will the balloon have when the temperature is lowered to -25oC and the pressure is increased to 1.5 atm?
A weather balloon filled with hydrogen at 1 atm and -27^(h)C has volume equal to 1200 litres. On ascending, it reaches a place where temperture is -23^(h)C and pressure is 0.5 atm.
