will a propane and helium balloon be lighter than air. Proportion of each gas?

Question

Will the helium affect the combustion of the propane?

Answer 1

Helium is inert, no reaction with propane. Try oxygen. If you light that baby up, the explosion will form a partial vacuum for a split second.

Answer 2

do you mean two balloons filled with He, and propane respectively, or a balloon filled with a mixture of the gasses?

Helium balloons float because of Archimedes' Principle, that is, the buoyant force on any object is equal to the weight of the fluid or gas it displaces.

Therefore if V = the balloon's volume, D(a) = the density of air , D(h) = ""helium, D(p) ""propane, and the total force F = buoyancy - weight, and g = the acceleration due to gravity
then the first case ,for example, is
F = g*V*D(a) - g*V*D(h) (for helium.)
F = g*V*D(a) - g*V*D(p) (for propane.)
Since propane is more dense than air the total force will be negative and the balloon will sink. If what youre asking for is the proportion of the two forces, just divide the first force by the second.(One thing with writing about science, is it pays to be specific!)

If the second case is what you're talking about, we also need
X = the volumetric ratio of helium to propane
= Litres He / Litres C3H8
then the relation is a little more complicated;
F = g*V*D(a) - g*V*{X*D(h)+ D(p)/X}.
Therefore, whether this force is positive or negative, depends on the total density of the mixture.

The addition of helium, an inert gas, to propane will lower the final combustion temperature, for the same reason that propane burns cooler with air than it does with pure oxygen. That is, that while burning propane produces the same amount of energy per mole of propane burned, in order to burn the fuel, you're also adding however much helium is also present in the mixture. Thus, in the end the heat of combustion is "spread out" into a larger volume of gas, and thus the final temperature is lowered.

Well, I hope you are not too confused. Good luck!

~Donkey Hotei

Answer 3

Balloon Gas Vs Helium

Answer 4

Propane - 44
Helium - 4
Air - ~14.4

4x + 44(1-x) < 14
4x +44 -44x < 14
-40x < -30

x>0.75

Therefore, the proportion of He must be at least 75%.

Yes, the helium will affect the combustion.

Answer 5

the perfect gas regulation says the the quantity of a gas relies upon on the rigidity, sort of gas debris (moleculs), and temperature. yet not on the mass of the gas debris. The formulation PV=nRT is for that (R is the consistent huge sort .08205 (something like that)) in any case. If we've the comparable quantity of He and CO2 on the comparable temperature. The sort of gas debris interior the balloon often is the comparable. yet considering that each helium atom weighs 4 amu. And CO2 weighs 40 4 amu. The CO2 balloon will weigh better than the helium. so the helium will upward thrust because of the fact its much less dense than the air, and the CO2 will sink considering that its heavier. Air has around something like 30 amu mass

Answer 6

Propane is Heavier than Air gas, that is a danger of it on boats, RVs and in homes. Propane is also Volitile around flames and ignition sources. see Hindenburg, Flamable Gas and Balloons not a gopod idea.

Answer 7

Propane is heavier than air.Helium is lighter than air.As long as the helium displaces more air than the propane, it might be.

Answer 8

I believe propane is heavier than air what do you want to do with it why not hydrogen and helium

Answer 9

The phrase 'lighter than air is used commonly, and in this article, to mean less dense than air.

Some gases are buoyant in air because they have a density that is less than the density of air. Lighter than air gases are used to fill balloons, airships, and aerostats to make the whole aircraft, on average, lighter than air. (Heavier than air aircraft include aeroplane and helicopters.)


Hot air
The density of a gas can be reduced by raising its temperature while leaving the pressure unchanged (Boyle's law).

Heated air is widely used as a lifting gas in hot-air balloons. (The gas in a hot-air balloon is not only heated air, but also includes the products of combustion from the balloon's burner.)

The altitude of a hot air balloon is controlled by regulating lift. To increase lift, more heat is applied. To decrease lift slowly, the hot air is allowed to cool. To decrease lift quickly, hot air is vented. Unlike balloons using low molecular mass gases (see below), hot air balloons require continual burning of fuel in order to remain aloft.


Low molecular mass gases
Because any given volume of any gas at a given temperature and pressure contains the same number of molecules (Avogadro's law), any gas with a lower molecular mass than that of air will be lighter than air (at the same temperature and pressure).

A sealed balloon expands as it rises because air pressure decreases with increasing altitude. As buoyancy depends on the mass of the displaced gas (Archimedes' principle) and because air is less dense at higher altitudes, balloons which rise to high altitudes (such as weather balloons) have to be allowed to expand as they climb so as to support the same weight. Weather balloons are made with strong elastic "envelopes" so that they do not burst as they expand.

Determining which gases are lighter than air is relatively straightforward. These gases must have a molecular mass less than 28.97 (the average molecular mass of air) and exist as a gas at atmospheric temperatures and atmospheric pressures.

Assuming one atom per molecule of gas, the heaviest possible atom that could meet these criteria is silicon, which has an atomic mass of 28.1. However, silicon does not become a gas until it reaches a very high temperature. The same applies to the metals aluminum, magnesium, sodium, beryllium and lithium and the hydrides of these. Carbon and boron have high boiling points, but methane and borane (the hydrides of carbon and boron) are lighter than air.

The following is a list of all stable materials with a molecular mass under 28.8 and a boiling point under 100°C. Isotopes are not considered here.

HAHAMICE
The acronym HAHAMICE was used to help emergency responders remember the gasses which are lighter then air. It stood for:

H - HydrogenA - AmmoniaH - HeliumA - Acetylene

M - MethaneI - Illuminating Gases (old term for natural gas)C - Carbon MonoxideE - Ethylene

This acronym left out several gases and was later changed to 4H MEDIC ANNA:

H - HydrogenH - HeliumH - Hydrogen CyanideH - Hydrogen Fluoride

M - MethaneE - EthyleneD - DiboraneI - Illuminating GasesC - Carbon Monoxide

A - AcetyleneN - NeonN - NitrogenA - Ammonia

As is noticeable, the acronyms do not include all lighter than air gases.

Many of these gases are not practical for use in balloons. The following combine poor lift with objectionable properties: carbon monoxide, hydrogen cyanide, hydrogen fluoride, diborane, ethylene and acetylene. Nitrogen has negligible lift. Neon is harmless and offers a modest degree of lift; however it costs roughly the same as helium, another noble gas with far superior lift. The four remaining gases (ammonia, methane, helium, and hydrogen) have been used as balloon gases.

Ammonia has sometimes been used to fill weather balloons. Due to its relatively high boiling point (compared to helium and hydrogen), ammonia could potentially be refrigerated and liquified aboard an airship to reduce lift and add ballast (and returned to a gas to add lift and reduce ballast).

Methane (the chief component of natural gas) is sometimes used as a lift gas when hydrogen and helium are not available. It has the advantage of not leaking through balloon walls as rapidly as the small-moleculed hydrogen and helium. (Most lighter than air balloons are made of aluminized plastic that limits such leakage; hydrogen and helium leak rapidly through latex balloons.)


Hydrogen and helium
Hydrogen and helium are the most commonly used lift gases. Although helium is twice as heavy as (diatomic) hydrogen, they are both so much lighter than air that this difference is inconsequential. (Both provide about 1 kilogram of lift per cubic meter of gas at room temperature and sea level pressure.) Helium is preferred because it is not combustible.

Many countries have banned the use of hydrogen as a lift gas for manned vehicles. The Hindenburg disaster is frequently cited as an example of the risks posed by hydrogen. The high cost of helium (compared to hydrogen) has led researchers to reinvestigate the safety issues of using hydrogen as a lift gas: with good engineering and good handling practices, the risks can be significantly reduced. It has been suggested that policy might allow hydrogen for cargo airships (both those unmanned and those manned only by pilots) and require helium for passenger airships.


Low pressure buoyancy
The average density of an aircraft can be reduced, at least in principle, by creating a partial vacuum. To be lighter than air, the envelope of such a device would have to be strong enough to resist crushing by atmospheric pressure yet light enough for the net density of the craft to be less than that of the surrounding air. The concept of an airship supported by the buoyancy of a vacuum has been explored in science fiction but no such device has ever been constructed.

Derivation
The ideal gas laws (Avogadro's law, Boyle's law, and Charles's law) are used to approximate gas density.

These three laws show that a gas with low density can be achieved by:
lowering the pressure (Boyle's law);
raising the temperature (Charles's law); or
reducing the molecular mass (Avogadro's law).