Saturated pressure and saturated temperature
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I want to understand this: in gas-liquid equilibrium, the saturated temperature corresponds to a saturated pressure. Does this saturated pressure refer specifically to the pressure of the gas form of that substance? Or is it sufficient that the pressure be any force acting on that substance? If that’s the case, then why is the saturated vapor pressure equal to the partial pressure of the gas form of that substance?
For a mixture, the saturated pressure at a certain temperature is the sum of the saturated partial pressures of the various components.
How is the vapor pressure of liquids involved in this part as well? What does this mean?
The steam mentioned here refers not merely to water vapor, but rather to the vaporization temperature of a particular element. The gas of this vaporized substance is also called steam.
So, if there is air inside a closed container and the liquid water within it is heated, then when saturation is reached, what does the saturation pressure refer to – merely the pressure at which water turns into steam, or it is the pressure at which water turns into steam plus the pressure of the air present?
So, if there is air inside a closed container and the liquid water within it is heated, then when saturation is reached, what does the saturation pressure refer to – merely the pressure at which water turns into steam, or it is the pressure at which water turns into steam plus the pressure of the air present?
The last edit to this post was made by Avahai on 2018-10-2 at 17:57. Saturation pressure refers to gauge pressure, while the pressure of water alone is absolute pressure
Water boils at 100 degrees Celsius at standard pressure (101.325 kPaA); therefore, the saturated vapor pressure of water at 100 degrees is 101.325 kPaA. At a pressure of 97.16 kPaG (198.48 kPaA), water boils at 120 degrees; therefore, the saturated vapor pressure of water at 120 degrees is 198.48 kPaA. G is gauge pressure, and A is absolute pressure. For a mixture, the saturated pressure at a certain temperature is the sum of the saturated partial pressures of the various components.