1) A helium-filled balloon is launched when the temperature at ground level is 2
ID: 1068916 • Letter: 1
Question
1) A helium-filled balloon is launched when the temperature at ground level is 27.8°C and the barometer reads 752 mmHg. If the balloon's volume at launch is 9.47 × 104 L, what is the volume in Liters at a height of 36 km, where the pressure is 73.0 mm Hg and temperature is 235.0 K? (Enter your answer using either standard or scientific notation.
2) A yellow balloon is filled with 0.5 mol of Ne and a red balloon is filled with 1.0 mol of Ar. Both balloons are at 273 K and 1.0 atm of pressure. The volume of the red balloon is ________ that of the yellow balloon.
Explanation / Answer
1)
Vi = 9.47*10^4 L
Ti = 27.8 oC = (273 + 27.8) K = 300.8 K
Pi = 752 mm
Vf = ?
Tf =235.0 K
Pf = 73.0 mm
use:
Pi*Vi/Ti = Pf*Vf/Tf
752* 9.47*10^4 / 300.8 = 73.0*Vf/235.0
Vf = 7.62*10^5 L
Answer: 7.62*10^5 L
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