Why Does The Flame Pull The Water In?


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  1. The molecules in the beaker absorb energy from the candle, increasing the pressure above the exterior ambient. Pressure in the beaker neutralizes. Less molecules remain in the beaker to absorb energy. at that point and the beaker internal temperature drops, resulting in lower pressure. The exterior ambient pressure forces red water onto the beaker. The candle continues to burn until oxidation stops. Internal temperature and pressure drop and more red water is forced into the beaker until interval and external pressures are equal.

  2. Water goes out is the expanded air with heat
    Water goes in has nothing to do with o2 (1 molecule) consumption because you're generating co2 (1 molecule)
    The by the time the heat dissipate from the inside air to the bottle (ignoring bottle expansion) and outside environment the air cools off and size reduces, less pressure and water gets in until the inside pressure almost equalizes with the atmospheric pressure
    Inside pressure = the atmospheric pressure in mm water – the height of the water column inside the bottle in mm
    (using distilled water for both, same density)

  3. It’s the fire sucking the oxygen out of the beaker and when there’s no more oxygen it creates a vacuum and forces water up to get the o2 outside of the glass.

  4. The volumes of oxygen and carbon dioxide produced by combustion are approximately equal. The thermodynamic effect related to the heating of the gas inside the glass bulb is decisive. There is a formula for this: p*V=n*R*T

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