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What is the best definition of vapor pressure?
Vapour pressure is a measure of the tendency of a material to change into the gaseous or vapour state, and it increases with temperature. The temperature at which the vapour pressure at the surface of a liquid becomes equal to the pressure exerted by the surroundings is called the boiling point of the liquid.
What is my vapor pressure?
In chemistry, vapor pressure is the pressure that is exerted on the walls of a sealed container when a substance in it evaporates (converts to a gas). To find the vapor pressure at a given temperature, use the Clausius-Clapeyron equation: ln(P1/P2) = (ΔHvap/R)((1/T2) – (1/T1)).
Which is true of vapor pressure?
True Vapor Pressure is the pressure of the vapor in equilibrium with the liquid at 100 F (it is equal to the bubble point pressure at 100 F). Reid Vapor Pressure is the vapor pressure of a chilled sample of gasoline or other fuel as measured in a test bomb at 100 F.
What is vapor pressure and example?
The vapor pressure of a liquid is the equilibrium pressure of a vapor above its liquid (or solid); that is, the pressure of the vapor resulting from evaporation of a liquid (or solid) above a sample of the liquid (or solid) in a closed container. Examples: substance. vapor pressure at 25oC. diethyl ether.
What is true about vapor pressure quizlet?
The vapor pressure is the pressure of the gas at a given temperature in equilibrium with its liquid phase. The vapor pressure increases with increasing surface area of the liquid. E. Substances with weak intermolecular forces have high vapor pressures at a given temperature.
Which of the following is true about vapour pressure of a liquid?
1. Which of the following statement is true about vapor pressure of a liquid? Explanation: The vapor pressure of a liquid at a given temperature is given by the pressure ex-erted by the saturated vapor on the liquid surface. When the vapor is saturated, an equilibrium exists between the liquid and the vapor phases.
What is the importance of vapor pressure?
The vapour is said to be “pushing” against the atmosphere. In other words, the higher the vapour pressure the faster a liquid evaporates. When the vapour pressure reaches the atmospheric pressure, the liquid is at its boiling point.
What is vapour pressure definition Class 12?
Vapour pressure is the pressure exerted by vapours when they are in equilibrium with the liquid phase at a given temperature. Vapour pressure of a liquid increases with increase in temperature due to increase in kinetic energy of molecules.