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Does vapour pressure include the partial pressure of water vapour in the atmosphere during boiling process?
The partial pressure of water (vapor) is included in the total pressure of the atmosphere (air) when boiling.
What would have more vapour pressure pure ice or sweet ice?
Both will have same vapour pressure as salt{NACL} would get trapped in ice and in solid iced state get seprated from pure ice crystals. so in case melting of ice in soln state pure water will have more vapour pressure but in solid state both will have same vapour pressure.
What is the unit of true vapour pressure?
Pa, pascal
Does vapour pressure depend upon the nature of a liquid?
because nature of liquid means a attractive forces less attractive forces means low vapour pressure
Ethylene glycol has a vapour pressure of 14.9mmHg at 373K and a vapour pressure of 49.1 mmHg at 398K calculate the enthalpy of vapourization of ethylene glycol?
59.0 KJ/mol
Does the evaporation in the evaporation column influence the total pressure?
evaporation as such influence on the total pressure. evaporation occurs when the total pressure is greater than the surface molecules vapour pressure. as the rate of evaporation increases , more vapour will be there at the top, and then the new total pressure will become the sum of the earlier total pressure and vapour pressure of the vapour evaporated. hence total pressure increases.............
What is equilibrium vapor pressure?
It is vapor molecules in equilibrium with a liquid in a closed system exert a pressure proportional to the concentration of molecules in the vapor state.
How ostwald and walker method can be used to find out molecular weight?
A strem of dry air is bubbled through the solution & solvent from the loss in weight of solvent & solution the relative loweing of vapour pressure calculated. From relative lowering of vapour pressure molecular weight is calculated. anupama
Which one has high vapour pressure water or alcohol?
alcohol has high vapour pressure than water at room temperature.
Why the relative lowering of vapour pressure is independent of temperature?
Relative lowering of vapour pressure is function of pressure of pure liquid and pressure of solutions when you increase temperature both the values increase and compensate the increase value, According to the Raoult's law, Psolvent = Xsolvent Po where Psolvent is the vapour pressure of the liquid solution, Xsolvent is its mole fraction in the solution and Po is the pure vapour pressure.
Why relative lowering of vapour pressure is independent of temperature?
Relative lowering of vapour pressure is function of pressure of pure liquid and pressure of solutions when you increase temperature both the values increase and compensate the increase value, According to the Raoult's law, Psolvent = Xsolvent Po where Psolvent is the vapour pressure of the liquid solution, Xsolvent is its mole fraction in the solution and Po is the pure vapour pressure.
What is pressure vapour?
Vapour pressure is the pressure of the steam of a substance at a certain temperature. This does not automatically mean that the substance is completely evaporated. When the vapour pressure reaches the surrounding (atmospheric) pressure, the substance starts to boil or sublimate. Also at very low temperatures, even when the substance is in solid state, a certain amount of substance already exists as vapour. Though, for the most substances, the proportion of vapour is very small compared to the solid portion. Finally, a substance does not have to melt before it evaporates. This is called sublimation and occurs, e.g., when solid carbon dioxide (dry ice) is used: It will evaporate directly from the solid state (under normal ambient physical conditions), because, with rising temperature, the vapour pressure is already exceeding the atmospheric pressure before the melting point is reached. For details, have a look at the provided link.
How do you calculate actual vapour pressure?
pressure=force/area
Does vapour pressure include the partial pressure of water vapour in the atmosphere during boiling process?
The partial pressure of water (vapor) is included in the total pressure of the atmosphere (air) when boiling.
What refers to the amount of water vapour in the air?
Relative Humidity is the measure of water vapour in air. It is the ratio of the actual water vapour in air divided by the maximum amount the water the air can hold at the existing temperature and pressure. It tells how fast or slow the water on the body or in clothes will evaporate or in otherwords is the air dry or humid. Absolute measure of water vapour in air is called specific humidity. It can be measured as ratio of mass of water and mass of dry air.
What is the condition which occurs when the atmospheric pressure is equal to the vapour pressure?
boiling
What would have more vapour pressure pure ice or sweet ice?
Both will have same vapour pressure as salt{NACL} would get trapped in ice and in solid iced state get seprated from pure ice crystals. so in case melting of ice in soln state pure water will have more vapour pressure but in solid state both will have same vapour pressure.
