Why is the vapor pressure of water important in this experiment?Select one:The water vapor pressure is not important because the only gas inside the graduated cylinder is butane.The trapped gas inside of the graduated cylinder is a mixture of water and butane.The vapor pressure of water is not important because we are measuring the air pressure.The vapor pressure of water contributes to the humidity on the outside, so it must be accounted for only on high humidity days.
Question
Why is the vapor pressure of water important in this experiment?Select one:The water vapor pressure is not important because the only gas inside the graduated cylinder is butane.The trapped gas inside of the graduated cylinder is a mixture of water and butane.The vapor pressure of water is not important because we are measuring the air pressure.The vapor pressure of water contributes to the humidity on the outside, so it must be accounted for only on high humidity days.
Solution
The correct answer is: The trapped gas inside of the graduated cylinder is a mixture of water and butane.
This is because when an experiment is conducted in a graduated cylinder containing water, the trapped gas is not just butane. It is a mixture of butane and water vapor. Therefore, the vapor pressure of water is important in this experiment. The vapor pressure of water can affect the total pressure inside the cylinder, and thus it needs to be taken into account when calculating the pressure of the butane gas.
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