When a gas is heated it expands because?
602679
When a gas is heated the electrons present within the gas atom jump to a higher energy state and become unstable. The energy variation between them make the atoms much more intolerant towards each other, hence the atoms occupy greater distance between them to maintain stability at that temperature.
789678
b   the fuel burns and and creates heat the hot gas expands and drives the piston creating work
629212
The pressure between the inside of the can and the outside will equalize. It won't blow up in the sense of destroying the can. What might happen is that the metal near the puncture will tear a bit as the escaping gas rushes past it- in the same way a hole in a dam would 'grow' as water flows through it.\n\nProbably of more interest is that the escaping gas will be at a much, much colder temperature as it expands. This can lead to a surprising freezing effect at, on and near the can.\n\nIt is much more dangerous to heat a pressurized can without puncturing it. In this case, the can can fail as the pressure increases (due to the heating) and burst along a large seam instead of a small hole. Pieces of the can can be ejected quite powerfully in this scenario. The puncture scenario doesn't give you this effect at all.
629048
i dont think so, when a gas condenses, it gives heat to the surrounding air
149015
PV=nRT is the formula you want to use to explain this. P is Pressure, V = Volume, n= Moles of molecule, R is a constant, T = Temerature. Now the reasoning behind this is because molecules that in the in gas phase want to be far apart from each other as possible. If you try to increase the pressure, you are forcing the molecules to come closer together. These molecules then rub up against each other more, creating heat.
844159
True \nPressure is caused by the collision of the atoms which make up a gas with the wall of a container\n\nFalse\nAtoms move about more rapidly in a solid than a gas\n\nTrue \nThe speading of a gas to fill a container is called diffusion\n\nTrue \nWhen a gas is heated, its atoms have more kinetic energy
470974
The can and the air inside it expand. The can doesnt expand much, but the air does and a bunch of it flows out. When the can is placed in the cold water the can contracts really quickly and because there is less air pushing back on the walls it crunches up. There is nothing really big happening chemically.
423652
It can.\n\nThe sun's heat will cause the gas inside the cylinder to expand.  Eventually, this expansion can exceed the cylinder's ability to contain the gas and it will explode.\n\nThe other poster is right, though.  Gas cylinders are manufacured to prevent this from happening.  But, it can, in fact happen.\n\nI've seen it happen with SCUBA tanks.
732805
Increasing the temperature (adding energy) increases the molecular vibration.
354017
its a high pressure heat with constant movement that create volume, density conductors
224663
According to Charle's Law, the volume and temperature of a gas are related as follows,\n\nV1 / T1 = V2 / T2\n\nSo if you half the initial temperature, the volume of the the gas would need to be halfed aswell in order for the above eqaution to stay true.\n\nWhen the temperature of gas is decreased (all other things remaining constant), its volume decreases aswell.  The same for when a gas's temperature increases, the gas expands.
758754
materials usually expand when heated. Notable exception is ice which contracts when heated to form water.
752533
Heat is absorbed by the particles of the substance causing their motion to increase.  As the motion of the particles increases they are able to break the forces of attraction holding them together and the move further apart.  So solids lose their regular pattern and become liquids; liquids break their attractions holding them together as a liquid and the particles move very far apart and become gases
152571
By heating the lid is bigger than it was, and bigger than the jar. So the lid is just seems like other bigger jar's.\nEven if you heated the metal lid and the gas together, you will get the same result, as jar's expansion is less than the lid's expansion.
1159227
As a general rule, warm air rises and cool air sinks\nit expands and becomes lighter as the molecules of air move farther apart
461222
its not just that "heat rises", but that things with lower densities rise above things with higher densities. ice floats in water, helium floats in air, etc.  heat is not an object that can rises, but it is an attribute of particles that affects their density. just like hot air rises, when a flame burns, it produces hot gases that rise. these gases are hot enough to produce light, so we see the light rising with the gases. by the time they have risen above the flame, they are no longer hot enough to give off light, so the flame doesn't go up forever.
378824
Temperature affects state change. If something, for instance water, is heated, it becomes a gas. Gases take up more volume than liquids. So the hotter a gas is, the larger it will expand, and the same is true, to a lesser degree, for solids and liquids. Hope I helped,\nZ