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What is low vapor pressure?
Vapor pressure refers to the force exerted by gaseous molecules of a liquid. Usually this is measured in a closed system. For example, in a water bottle some H2O molecules are able to move from liquid to gas phase at room temperature. The molecules that do this create vapor pressure. Low vapor pressure is usually observed in substances that have a low boiling point or if it is being held at a low temperature.
A pure solvent has a vapor pressure the vapor pressure of a solution A.EQUALTO B.LOWER THAN C.higher than?
A solution has a higher vapor pressure than a pure solvent. This is why salt water boils faster than pure water.
What happens when air is humid?
Humidity (relative) is the amount of water vapor in the air, expressed as a percentage of the maximum amount that the air could hold at the given temperature; the ratio of the actual water vapor pressure to the saturation vapor pressure. So pretty much the air is moist and heavy.
What is a brief description of the basic refrigeration cycle?
Starting at the compressor;Low pressure vapor refrigerant is compressed and discharged out of the compressor.The refrigerant at this point is a high temperature, high pressure, superheated vapor.The high pressure refrigerant flows to the condenser by way of the "Discharge Line".The condenser changes the high pressure refrigerant from a high temperature vapor to a low temperature liquid and leaves through the "Liquid Line".The high pressure refrigerant then flows through a filter dryer to the Thermal Expansion valve or TXV.The TXV meters the correct amount of liquid refrigerant into the evaporator.As the TXV meters the refrigerant, the high pressure liquid changes to a low pressure, low temperature, saturated vapor.This saturated vapor enters the evaporator and is changed to a low pressure dry vapor.The low pressure dry vapor is then returned to the compressor in the "Suction line".The cycle then starts over.
What is the meaning of boiling in science terms?
Actually boiling is a point where the vapour pressure of any liquid (example: water) becomes equal to the surrounding pressure.
What two characteristics of the troposhpere make it possible to retain water vapor on earth?
The two characteristics of the troposphere that help retain water vapor on Earth are the relatively low temperatures and high pressure at lower altitudes. The low temperatures allow the air to hold more water vapor, while the high pressure helps keep the water vapor from escaping into space.
What is low vapor pressure?
Vapor pressure refers to the force exerted by gaseous molecules of a liquid. Usually this is measured in a closed system. For example, in a water bottle some H2O molecules are able to move from liquid to gas phase at room temperature. The molecules that do this create vapor pressure. Low vapor pressure is usually observed in substances that have a low boiling point or if it is being held at a low temperature.
What is the state of refrigerant entering the compressor of a refrigeration system?
low temperature low pressure vapor
How does vapor pressure of water at 50 oC compare with its vapor pressure at 50 oC?
The saturated vapor pressure of water at 50 oC is 123,39 mm Hg.
What causes waters low vapor pressure?
Water molecules hydrogen bond which is a very strong intermolecular force. As a result the water molecules are held together well. Vapor pressure is dependent on how well molecules are intermolecularly bonded to one another. If a substance like water is held together well then it will have a low vapor pressure because a larger amount of energy is required to break these intermolecular bonds. Compare water to carbon tetrachloride which is non polar and can't hydrogen bond. Because it only has weak London dispersion forces to hold the molecules together it will have a higher vapor pressure. This is because only a small amount of energy is required to break the intermolecular bonds causing the CCl4 to vaporize.
What causes cool temperatures of water vapor?
Cool temperatures of water vapor are usually caused by the expansion of the vapor, leading to a decrease in temperature through adiabatic cooling. This can occur when water vapor rises in the atmosphere, expands due to lower pressure, and cools as it ascends. Additionally, the mixing of cooler air with warm, moisture-laden air can also cause the temperature of water vapor to decrease.
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.
What has a higher vapor pressure water at sea level or the mountains?
water at sea level has higher vapor pressure
Why does water have an unusually low vapor pressure for a liquid?
Because the water molecule is polar (which is to say, it has positive and negative poles) water molecules attract each other more than most other molecules of liquids have for each other. This creates a phenomenon called surface tension. Water molecules which travel freely within the body of water, meet a kind of barrier at the surface, because of this attraction to other water molecules. Hence, water does not evaporate as easily as most liquids.
What is vapor pressure of water?
The vapor pressure of pure water at 25 degrees Celsius is 23.8 torr.
What is a sentence using the word vapour?
ice can be turned into Vapor. You just have to make the pressure low.
Why water is vaporized in winter as well as summer?
Because water has a non-zero vapor pressure even at very low temperatures.
