Nitrogen gas at 20. °C in a balloon has a volume of 3. 0 L and pressure of 1. 5 atm. If the temperature of the balloon is increased to 30. °C and the pressure to 2. 5 atm, what is the new volume of the balloon? Use the formula: P1V1 T1 = P2V2 T2 Temperature Conversion: °C 273 K.