# Question: You have a helium balloon at 1 00 atm and 25oC

You have a helium balloon at 1.00 atm and 25oC. You want to make a hot-air balloon with the same volume and same lift as the helium balloon. Assume air is 79.0% nitrogen and 21.0% oxygen by volume. The “lift” of a balloon is given by the difference between the mass of air displaced by the balloon and the mass of gas inside the balloon.

a. Will the temperature in the hot- air balloon have to be higher or lower than 25oC? Explain.

b. Calculate the temperature of the air required for the hot- air balloon to provide the same lift as the helium balloon at 1.00 atm and 25oC. Assume atmospheric conditions are 1.00 atm and 25oC.

a. Will the temperature in the hot- air balloon have to be higher or lower than 25oC? Explain.

b. Calculate the temperature of the air required for the hot- air balloon to provide the same lift as the helium balloon at 1.00 atm and 25oC. Assume atmospheric conditions are 1.00 atm and 25oC.

## Relevant Questions

An ideal gas is in a cylinder with a volume of 5.0 × 102 mL at a temperature of 30.oC and a pressure of 710 torr. The gas is compressed to a volume of 25 mL, and the temperature is raised to 820oC. What is the new pressure? An ideal gas at 7oC is in a spherical flexible container having a radius of 1.00 cm. The gas is heated at constant pressure to 88oC. Determine the radius of the spherical container after the gas is heated. (Volume of a ...Determine the partial pressure of each gas as shown in the figure below. The relative numbers of each type of gas are depicted in the figure. Given that a sample of air is made up of nitrogen, oxygen, and argon in the mole fractions 78% N2, 21% O2, and 1.0% Ar, what is the density of air at standard temperature and pressure? Metallic molybdenum can be produced from the mineral molybdenite (MoS2). The mineral is first oxidized in air to molybdenum trioxide and sulfur dioxide. Molybde-num trioxide is then reduced to metallic molybdenum using ...Post your question