A modern statement is: Avogadro’s law states that “equal volumes of all gases, at the same temperature and pressure, have the same number of molecules.” For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.
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Why do all gases occupy the same volume?
Avogadro’s hypothesis states that equal volumes of all gases at the same temperature and pressure contain equal numbers of particles. Since the total volume that a gas occupies is made up primarily of the empty space between the particles, the actual size of the particles themselves is nearly negligible.
How is it possible that all gases have the same volume at the same temperature and pressure?
At the same temperature and pressure equal volumes of all gasses contain the same number of molecules. With this example we can clearly see the relationship between the number of moles of a gas, and the volume of a gas.
Do different gases have different volumes?
The molar volumes of all gases are the same when measured at the same temperature and pressure. However, the molar masses of different gases will vary. This means that different gases will have different densities (different masses per unit volume).
Do gases occupy volume?
The gas takes up volume since the molecules expand into a large region of space, but the Ideal gas molecules are approximated as point particles that have no volume in and of themselves.
Do all gases have same density?
Since gases all occupy the same volume on a per mole basis, the density of a particular gas is dependent on its molar mass. A gas with a small molar mass will have a lower density than a gas with a large molar mass.
What determines the volume of a gas?
Answer and Explanation: The volume of a gas is determined by the volume of the container it is in. Gases take the shape of their container and the volume of the container.
Which gas occupies the most volume?
So, since STP one mole gives us 22.4 leaders, whichever of these has the greatest amount of moles is going to have us give us the greatest volume. So the one that gives us the greatest volume Is the 10 g of helium.
Are all gases the same?
All Gas Is the Same (Up to a Point) However, each company is required by law to put additives in the fuel. The composition, quantity, and quality of the additives is proprietary. All gas contains additives, but they aren’t created equal.
What characteristics of gases make it possible for equal volumes of gases?
Equal volumes of gases at the same conditions contain the same number of particles. Standard temperature and pressure is abbreviated (STP).
Why is it possible for equal volumes of gases at standard pressure?
If we have equal volumes of gases, at standard pressure and temperature, then it is possible for them to contain equal numbers of particles because (2.5 Points) The volume of J gas is inversely proportional t0 its mass.
Why can equal volumes of gases at standard pressure and temperature have to contain equal numbers of particles?
Avogadro’s hypothesis states that equal volumes of all gases at the same temperature and pressure contain equal numbers of particles. Since the total volume that a gas occupies is made up primarily of the empty space between the particles, the actual size of the particles themselves is nearly negligible.
What do all gases have in common?
Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form.
Why do different gases have different density?
But for gases, the density can vary over a wide range because the molecules are free to move. Air at the surface of the earth has a very different density than air 50 kilometers above the earth.
What two properties of gas depend on its container?
The shape and the volume of the gas depend on its container.
Why do gasses have no fixed volume?
Due to the weak internuclear force of attraction, the gaseous particles have enough kinetic energy and they can move in any direction without any restrictions. Hence, the gases do not have a fixed shape and fixed volume.
Why does gas not have volume?
Gases do not have a definite shape or volume because the molecules in gases are very loosely packed, they have large intermolecular spaces and hence they move around. The force of attraction between molecules is also very less, as a result gases acquire any shape or any volume.
Can a gas have no volume?
Gas is a state of matter that has no fixed shape and no fixed volume.
What affects the density of a gas?
The density of gases depends upon the temperature. The higher the temperature, the more the molecules are spread out and the lower the density as shown in the graphic on the left. The result is that warm gases rise and cool gases sink. The same concept helps to explain the weather resulting in high and low pressures.
Do gases separate by density?
The primary reason why you don’t get separation of gases in the atmosphere by density is that the atmosphere (especially the lower atmosphere) is turbulent. The second reason, but one that is unimportant in the lower atmosphere, is diffusion.
Why do gases have a low density?
The particles in gases are very far apart, so gases have a very low density.
Does volume of a container depend on the gas?
It is inversely proportional to pressure. when the text say that volume is proportional to amount, it is assuming all other variables are constant, and not changed. So yes, in general, as there is an increase in volume, there is an increase in number of moles of gas.
What two variables can change the volume of gas?
Volume of a gas is directly proportional to the amount of gas at a constant temperature and pressure.
What determines the shape and volume of gas?
The shape and volume of a gas are the same as those of their container. Use what you know about particles in a gas to explain why a gas has no definite shape and no definite volume. A gas has neither a definite shape nor volume because its particles spread apart and move freely in all directions.
Which of the following gases occupy the largest volume at STP?
Ar (Argon) is the gas that occupies the highest volume at STP.