Why do the gas and vapours expand when heated?

Answer 1

Expansion of a gas has a limit, but before talking about limitation of expansion, take a look of the reason of the gas being expanded? Gas expend as its molecules vibrate with each other and with it self. So, if let say the gas gets vibrate due to increase in temperature, it will get away from the position where it is, otherwise a pressure builds up.

Second thing, put a number of how much, as a quantity, you have gas. Let say you have 22.4 liter of any gas, and that is one mole.

However, gas will expand to max limit, and will fill the space, provided the space is also limited, otherwise, I must say, the gas will not take over to fill whatever space it occupies due to certain conditions....

Answer 2

That is part of what makes a gas a gas. Its molecules are spread apart more so than liquids or solids, and it fills whatever it is contained by, like liquid, though gas is much more common than liquid, plus gas cannot spill, as all air is classified as gas (though humidity is technically liquid too, but just barely).

Answer 3

Heating the gas means increasing average kinetic energy and therefore speed of is particles. When particles are moving more rapidly they collide more often and with more energy, so the average distance between particles tends to increase. If the gas is contained, the effect is pressure increase.

Answer 4

Gas and vapors expand when heated because the increase in temperature causes the molecules to move faster and with greater kinetic energy. This greater kinetic energy results in the molecules exerting more force against the container walls, leading to expansion.

Answer 5

Because of diffusion. (molecules move from an area of high concentration to low concentration)

Answer 6

The gas and vapour expand because when heating the physical properties of gas and vapour change and it expanded