Under supervised or controlled conditions, push a lighted taper into the bottle. If the taper continues to burn, there is air in the bottle
Under supervised or controlled conditions, push a lighted taper into the bottle. If the taper continues to burn, there is air in the bottle
An empty bottle typically contains air or gas molecules. It may also contain remnants of the previous contents if it hasn't been thoroughly cleaned.
One way to show the presence of air in a seemingly empty bottle is to place a lit match into the bottle and quickly seal it shut. The match will extinguish due to lack of oxygen, indicating that the air in the bottle contains oxygen. Alternatively, you can shake the bottle vigorously and observe any condensation that forms inside, indicating the presence of moisture in the air.
When you suck air out of a bottle, you decrease the air pressure inside the bottle. The higher air pressure outside the bottle then pushes the walls of the bottle inwards, causing it to shrink. This is due to the difference in air pressure inside and outside the bottle.
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This bottle is used to contain reagents.
Leave it on the side to warm up, and condensation will form on the inside- little water droplets. As you haven't messed with the bottle at all (ie added anything to it) it should bepure air and therefore shows there is water vapour in the air.
Blowing air towards a bottle can either increase or decrease airflow within the bottle, depending on factors such as the pressure of the blown air and the size of the bottle opening. If the blown air has higher pressure than the air inside the bottle, it may push air into the bottle; conversely, if the blown air has lower pressure, it may draw air out of the bottle.
Moisture in the air condenses on the cold bottle. If the air is dry, there will be no dew on the bottle.
No, the 2 psi of air in a 2 liter bottle does not contain the same amount of air as two 2 liter bottles. The pressure (psi) of the air in the bottle refers to the force exerted by the air molecules on the walls of the container, not the volume of air inside. So, two 2 liter bottles would contain twice as much air as one 2 liter bottle with the same pressure.
Moisture in the air condenses on the cold bottle. If the air is dry, there will be no dew on the bottle.
The hypothesis for an egg in a bottle experiment could be that when the fire heats the air inside the bottle, the air expands and escapes. This creates a lower air pressure inside the bottle, allowing the egg to be forced into the bottle due to the higher air pressure outside.