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Hello everyone, my name is ahmed ali.
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We know that the liquid substance is considered water molecules or liquid molecules attracted to each other and the fall.
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So some of these molecules is go to the vapor state and the fall.
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And when we reach to dynamic equilibrium, the number of vapor, that become reach to equilibrium which become constant.
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And this vapor is called the vapor pressure.
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So the vapor pressure is related to the molecule that escape from the intermolecular forces and go to the gases state.
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So if we increase the temperature, what happened, and when we decrease the temperature, what happened, when we increase the temperature, the intermolecular force between the molecule in a liquid state dissociate and the some molecules of water convert to vapor and disease lead to increase the vapor pressure...