Question

Mixture of two vapours
1.Gas
2.Solid
3.liquid
4.vapour​

Answer 1

Answer:

Vapor pressure (or equilibrium vapor pressure) is the pressure exerted by a vapor in thermodynamic equilibrium with the condensed phases (solid or liquid) at a given temperature in a closed system. The equilibrium vapor pressure is an indication of the evaporation rate of the liquid and relates to the tendency of particles to escape from the liquid (or a solid). A substance with a high vapor pressure at normal temperatures is often referred to as volatile. As the temperature of a liquid increases, the kinetic energy of its molecules also increases and as the kinetic energy of the molecules increases, the number of molecules transitioning into a vapor also increases, thereby increasing the vapor pressure. When a sample of a liquid is introduced into a container, the liquid will tend to evaporate. Molecules will escape from the relative confinement of the liquid state into the gaseous state. If the container is closed, this conversion will appear to stop when equilibrium is achieved. Under equilibrium conditions, the rate of evaporation equals the rate of condensation.

A measure of the extent of vaporization is the vapor pressure which is the partial pressure exerted by the gas phase in equilibrium with the liquid phase. Other gases, such as air, can be present, but what matters here is the pressure of the substance involved in the gas-liquid equilibrium. Vapor pressure can be expressed in any convenient unit such as: mm mercury, atmospheres, bars, psi, Pascals, and Kilopascals. The higher the vapor pressure of a substance, the greater the concentration of the compound in the gaseous phase and the greater the extent of vaporization. Liquids vary considerably in their vapor pressures. If two substances are compared at the same temperature, the more volatile one will have the higher vapor pressure.

The vapor pressure of water is the pressure at which water vapor is in thermodynamic equilibrium with the condensed state. At higher pressures water would condense. The water vapor pressure is the partial pressure of water vapor in any gas mixture in equilibrium with solid or liquid water. Like all liquids, water boils when the vapor pressure is equal to the surrounding pressure. In nature, the atmospheric pressure is lower at higher elevations and water boils at a lower temperature—for example at 7000 ft above sea level, water boils at 92 °C (198 °F) instead of 100 °C (212 °F).

The heat of vaporization is the amount of heat needed to turn one gram of a liquid into a vapor, without a rise in the temperature of the liquid. The heat of vaporization is a latent heat which is the additional heat required to change the state of a substance from solid to liquid at its melting point, or from liquid to gas at its boiling point, after the temperature of the substance has reached either of these points. Note that a latent heat is associated with no change in temperature, but a change of state. Because of the high heat of vaporization, evaporation of water has a pronounced cooling effect and condensation has a warming effect.

The heat of vaporization of water is the highest known—as the molecules evaporate, the surface they evaporate from gets cooler (evaporative cooling) because the molecules with the highest kinetic energy are lost to evaporation. The process of evaporation in a closed container will proceed until there are as many molecules returning to the liquid as there are escaping. At this point the vapor is said to be saturated, and the pressure of that vapor (usually expressed in mm mercury) is the saturated vapor pressure.mark me as brainliest one brainliest helps me a lot pls

Explanation:

Answer 2

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