A spherical balloon with a diameter of 9 m is filled with helium at 20°C and 210 kPa. Determine the mole number and the mass of the helium in the balloon. Take the molar mass of helium to be 4.003 kg/kmol. The universal gas constant is kJ kmol-K Ru = 8.31447 "2²) = 8.31447 kPa-m³ kmol-K kPa.m³ kJ The mole number of the helium balloon is The mass of the helium balloon is kg. kmol.

A spherical balloon with a diameter of 9 m is filled with helium at 20°C and 210 kPa. Determine the mole number and the mass of the helium in the balloon. Take the molar mass of helium to be 4.003 kg/kmol. The universal gas constant is kJ kmol-K Ru = 8.31447 "2²) = 8.31447 kPa-m³ kmol-K kPa.m³ kJ The mole number of the helium balloon is The mass of the helium balloon is kg. kmol.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

At room temperature, what fraction of the nitrogen molecules in the air are moving at less than 300 m/s?
What is the density of ambient air at 15°C and 1 atm?
Determine the mole fraction of the water vapor at the surface of a lake whose temperature at the surface is 70°F, and compare it to the mole fraction of water in the lake. Take the atmospheric pressure at lake level to be 13.8 psia.
Consider a glass of water in a room that is at 20°C and 40 percent relative humidity. If the water temperature is 15°C, determine the vapor pressure (a) at the free surface of the water and (b) at a location in the room far from the glass.
A 4.79-ft3 container is filled with 2.96-lbm of oxygen at a pressure of 87.97 psia. What is the temperature (R) of the oxygen?
Carbon dioxide at 537°R and 14.7 psia has a density of 0.1123 lbm/ft3. Determine (a) the gas constant; (b) the molecular weight based on the gas constant.
Some air at a temperature of 40°C and pressure 4 bar occupies a volume of 0.05 m^3. Determine the mass of the air assuming the characteristic gas constant for air to be 287 J/(kgK)
Carbon dioxide of mass 0.9 kg is contained in a vessel at a pressure of 4 MPa and atemperature of 500 °C. The gas is allowed to expand into an empty connected vessel, duringwhich its temperature falls to 120 °C. The combined volume of the two vessels is 0.45 m3.Determine (i) the initial volume of the carbon dioxide, (ii) its final pressure and (iii) thepolytropic index ‘n’ of the expansion process. Carbon dioxide has a molecular weight of 44 and the universal gas constant is 8314 Jkmol-1K-1.
Determine properties of saturated vapor if its temperature is 228 °C.
Compressed gases and phase-changing liquids are used to store energy in rigid containers. What are the advantages and disadvantages of each substance as a means of storing energy?
A mixture of hydrocarbon gases is composed of 60 percent methane, 25 percent propane, and 15 percent butane by volume. Determine the apparent gas constant of the mixture.
Determine the unit weight of dry air at 6°C and at 93 Kpa absolute. R=287J/kg*K