Density of Air at STP and in a Hot Air BalloonCalculate the density of dry air (a) under standard conditions and (b) in a hot air balloon at a temperature of 120 ºC . Dry air is approximately 78% N2, 21% O2, and 1% Ar .

Q: What happens if the ideal air balloon does not follow ideal gas laws?

A: We have to answer that what happens if the ideal air balloon does not follow ideal gas laws?

Q: Helium gas is in a cylinder that has rigid walls. If the pressure of the gas is 4.00 atm, then the…

A: Given:RMS speed of the helium gas at 4 atm pressure = 176 m/s

Q: Estimate the fraction of molecular volume to the actual volume occupied by oxygen gas at STP. Take…

A: Diameter of an oxygen molecule, d = 3 Å Radius, r =d/2 = 1.5 Å = 1.5 × 10 – 8 cm

Q: A Fahrenheit and a Celsius thermometer are both immersed in a fluid. What is the fluid temperature…

A: Let the temperature in Celsius be x. So the temperature in Fahrenheit is x/2. Now we know that the…

Q: "hat is the rms speed of a molecule with an atomic mass of 26 if the tenperature is 63.9 degrees…

A: Given Molar mass M = 26 g/mol =26 × 10-3 kg Temperature T = 63.9 oC = 273 + 63.9 =336.9 K

Q: Calculate the rms speed of an oxygen molecule at 2 °C. Express your answer to three significant…

A: Given,Length of teh room, L = 6.2 mtemperature, T = 2 °C = 275 Kv2 = vx2 + vy2 + vz2

Q: During the pre-flight controls on the F-16 aircraft, the gas pressure of the aircraft tire was…

A: Given data: The initial pressure is P1=200 kPa. The initial temperature is T1=20oC. The final…

Q: Air molecules (average molar mass 29 g/mol) have a temperature of 300 K. What is the ratio of the…

A: Given: Air molecules Molar mass M = 29g/mol Temperature T = 300K

Q: Estimate the fraction of molecular volume to the actual volume occupied by oxygen gas at STP. Take…

A: Diameter of oxygen molecule = 5 ARadius of molecule = 2.5 A

Q: 3- A 2.00-mol sample of oxygen gas is confined to a 5.00-L vessel at a pressure of 8.00 atm. Find…

A: It is given that    The number of moles of oxygen n = 2.00 The no of molecules in the above mole N =…

Q: One grám mole of oxygen at 27°C and one atmospheric pressure is enclosed in a vessel.Assuming the…

A:

Q: At atmospheric pressure and a temperature of 3.64 K helium can still exist in gas phase. Find the…

A:

Q: The air pressure supplied to a scuba diver must equal that exerted by the surrounding seawater, and…

A: Given that            The partial pressure of oxygen in air at sea level (one atmosphere) is 0.209 ×…

Q: An automobile tire is inflated to 32 psig pressure at 50 degrees fahrenheit. After being driven the…

A:

Q: The viscosity of a liquid at a particular temperature is 1500 cP. What is the density of the liquid…

A:

Q: A sample of neon gas has its volume doubled and it’s temperature held constant. What will be the new…

A:

Q: Air molecules (average molar mass 29 g mole-) have a temperature of 300 K. What is the ratio of the…

A: As per the Maxwell-Boltzmann speed’s distribution, the speed’s distribution function can be given…

Q: Calculate the most probable speed, average speed, and rms speed for oxygen (O2) molecules at room…

A: Standard Data used : Room temperature→25°C=298K O2 molecule mass →32×10-3 kg /mol Gas constant…

Q: Can the mean effective pressure of an automobile engine in operation be less than the atmospheric…

A: Mean effective pressure or MEP is a term related to reciprocating engines. If MEP is found to act…

Q: 5. Air at room temperature has density of about 1,29 kg/m3. Assuming it to be entirely one gas, find…

A: Given data: The density of the air is ρ=1.29 kg/m3. The atmospheric pressure of the air is P=1 atm.…

Q: Suppose you are in a room that is at a temperature of 262.09K.  What is the approximate RMS velocity…

A: RMS or root mean square velocity is the square root of the sum of the squares of the velocities for…

Q: Some N2 gas is placed in an ultrahigh vacuum chamber at 18.9°C. If N2 has a collision diameter of…

A: GivenP = 471 x 10-9torr = 6.27 x 10-5 Pa         (itorr = 133.32 Pa)T = 18.9°c = 291.9kd = 395 pm =…

Q: An air bubble has a volume of 1.50 cm3 when it is released by a submarine 1.00 x 102 m below the…

A: Given,

Q: If you put a helium-filled balloon in therefrigerator, (a) will its volume increase, decrease, or…

A: (a) When you put a helium-filled balloon in the refrigerator, its, volume decreases. As the…

Q: Helium has the lowest condensation point of any substance; the gas liquefies at 4.2 K. 1.0 L of…

A: Given: The temperature of the gas = 4.2 K Initial volume = 1 L Mass of the helium = 125 g

Q: The pressure in an automobile tire depends on the tem- perature of the air in the tire. When the air…

A: Given: The initial air temperature is 25 C. The pressure reading is 210 kPa. The volume of the tire…

Q: An automobile tire is filled to a gauge pressure of 200 kPa at 10 C. After a drive of 100 km the…

A: Here the gauge pressure is given. To answer the question we have to use the actual pressure and…

Q: At the same pressure, the ideal gas law is density xtemperature = constant. An old house has only…

A: Given data: The air temperature upstairs is T1=20°C. The density of air is ρ1=1.2 kg/m3.

Q: A 9-m3 container is filled with 300 kg of R-134a at 10°C. What is the specific enthalpy of the…

A: The specific volume here can be obtained as Now, the vapor quality can be obtained using the…

Q: A balloon contains 10 g of Hz gas. What additional weight of argon gas ( at. Wt 40) must be added so…

A: Buoyant force =weight of liquid (fluid )displaced

Q: (III) When using a mercury barometer (Section 10–6), thevapor pressure of mercury is usually assumed…

A: (a) The mercury barometer measures the atmospheric pressure above the liquid present inside it. The…

Q: Use Avogadro’s number to find the mass of a helium atom.

A:

Q: In outer space the density of matter is about one atom per cm3 mainly hydrogen atoms, and the…

A: The expression for the rms speed is, Vrms=3kTm

Q: Q4: A diffuser, has air entering at 100 kPa, 280 K, with a velocity of 200 m/s. The inlet…

A: GIVEN: entering Velocity v = 200m/s inlet cross-sectional area = 100mm2 exit velocity =20m/s  exit…

Q: A gas contains 5 molecules with an instantaneous velocity of 2 m/s, 10 molecules with an…

A: The average velocity is given by vavg = ∑nivi∑ni The RMS or root mean squared velocity is given by…

Q: In the lungs, the respiratory membrane separates tiny sacs of air (pressure 1.00x105Pa) from the…

A:

Q: The rms speed of an oxygen molecule (O2) in a container of oxygen gas is 614 m/s. What is the…

A: Recall Vrms=3RTMwhere R is gas constant,T is temperature and M is molecular mass.

Q: Two ideal gases have the same mass density and the same absolute pressure. One of the gases is…

A: Given  Two ideal gases at same mass density i.e Helium and neon respectively p1 = p2 And at same…

Q: The gage pressure of an automobile tire is measured to be 210 kPa before a trip and 220 kPa after…

A:

Q: After spraying a room, volatile perfume particles are suspended in air. The translational rms speed…

A: Gaseous particle of perfume,  Mass, m = ? Translational rms speed , vrms = 3.762 X 10-3 m/s…

Q: 18.34 A container with volume 1.48 L is initially evacuated. Then it is filled with 0.226 g of N₂.…

A:

Q: Calculate the diffusion coefficients of 0.01 μm diameter aerosol particles at a temperature of 20 oC…

A:

Q: The gas constant R has the value 287 J/Kg * K for dry air. Using the ideal gas law (P = Pan RT): a.)…

A: Density of dry air:  The density of air or atmospheric density, denoted ρ, is the mass per unit…

Human Metabolism

Being described as the most complicated machine ever encountered by humans, the human body and the cell metabolism is nothing less than a wonder. Metabolism is the set of life-sustaining chemical reactions within organisms.