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What statements is true about vapor pressure?
Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid or solid phase at a given temperature. It increases with temperature and is higher for substances with weaker intermolecular forces. It can be used to predict evaporation rates and boiling points of liquids.
What has a higher vapor pressure water at sea level or the mountains?
Water has a higher vapor pressure at sea level because lower atmospheric pressure at higher altitudes reduces the boiling point and thus the vapor pressure of water.
What does the vapor pressure of water at 10 C compare with its vapor pressure at 50 C?
The vapor pressure of water at 10°C is lower than its vapor pressure at 50°C. As temperature increases, the vapor pressure of water also increases because more water molecules have enough energy to escape into the gas phase.
Why does lowered air pressure allow water to boil at room temperature?
Less force pushes down on the liquid, making it easier for gas to escape
How does the vapor pressure of water at 10 degrees celsius compare with its vapor pressure at 50 degrees celsius?
The vapor pressure of water at 10 degrees Celsius is lower than at 50 degrees Celsius. As temperature increases, so does the vapor pressure of water because more water molecules have enough energy to escape into the gas phase.
What statements is true about vapor pressure?
Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid or solid phase at a given temperature. It increases with temperature and is higher for substances with weaker intermolecular forces. It can be used to predict evaporation rates and boiling points of liquids.
What has a higher vapor pressure water at sea level or the mountains?
Water has a higher vapor pressure at sea level because lower atmospheric pressure at higher altitudes reduces the boiling point and thus the vapor pressure of water.
What does the vapor pressure of water at 10 C compare with its vapor pressure at 50 C?
The vapor pressure of water at 10°C is lower than its vapor pressure at 50°C. As temperature increases, the vapor pressure of water also increases because more water molecules have enough energy to escape into the gas phase.
Why does plain water boil faster then salt water?
A liquid boils when the vapor pressure of the liquid is equal to the atmospheric pressure. The presence of salt in the water reduces the vapor pressure of the water at the temperature at which plain or distilled water will boil. Since the temperature of the salt water must be higher to reach the same vapor pressure as the atmosphere, it takes longer to boil.
Is the vapor pressure of water lower at higher altitude?
Yes, the vapor pressure of water is lower at higher altitudes due to the reduced atmospheric pressure. As altitude increases, the fewer molecules in the air exert less pressure on the water's surface, causing it to evaporate more slowly.
How will the vapor pressure of pure water compare to an aqueous solution of sodium chloride?
The vapor pressure of pure water will be higher than that of an aqueous solution of sodium chloride at the same temperature because the presence of sodium chloride reduces the number of water molecules available to evaporate, lowering the vapor pressure of the solution. In other words, the solute particles in the solution interfere with the evaporation of water molecules, resulting in a lower vapor pressure compared to pure water.
Why does air containing large amounts of water vapor have lower pressure than air that is dry?
Air with high water vapor content has lower pressure because water vapor molecules are less dense than nitrogen and oxygen molecules found in dry air. This results in fewer gas molecules per unit volume, leading to lower pressure.
Why does lowered air pressure allow water to boil at room temperature?
Less force pushes down on the liquid, making it easier for gas to escape
How does the vapor pressure of water at 10 degrees celsius compare with its vapor pressure at 50 degrees celsius?
The vapor pressure of water at 10 degrees Celsius is lower than at 50 degrees Celsius. As temperature increases, so does the vapor pressure of water because more water molecules have enough energy to escape into the gas phase.
How does the vapor pressure of water at 10 C compare with its vapor pressure at 50 C?
The vapor pressure of water at 10°C is lower than at 50°C because temperature and vapor pressure are directly related – as temperature increases, so does vapor pressure. At 10°C, water has a lower tendency to evaporate compared to at 50°C due to lower kinetic energy and weaker intermolecular forces.
What is affected by surface elevation water vapor and temperature?
Surface elevation can affect air pressure, which in turn influences the amount of water vapor the air can hold. Higher elevations typically have lower pressure and cooler temperatures, leading to lower water vapor capacity. This can result in drier and less humid conditions at higher elevations compared to lower elevations.
Why does the boiling temperature of water decrease when the water is under reduced pressure such as it is in a higher altitude?
At higher altitudes, there is reduced atmospheric pressure, which leads to a lower boiling point of water. This happens because with lower pressure, it is easier for water molecules to escape into the air as vapor. Therefore, at higher altitudes, water reaches its vapor pressure (boiling point) at a lower temperature than at sea level.
