What is vapour pressure lowering class 12?
What is vapour pressure lowering class 12?
Q. 1: What is the lowering of the Vapour pressure of a solution? Ans: The phenomenon in which the vapour of a solvent (after the addition of a nonvolatile solute) has a value less than the vapour pressure of the same solvent in its pure form is called lowering of vapour pressure.
What is vapor pressure easy definition?
The vapor pressure is the force exerted on the walls of a closed container by the vaporized portion of a liquid.
What is vapour pressure class 9?
Vapour pressure is a property of liquid which related to evaporation. In other words, it is the pressure that is exerted by a vapour in equilibrium with its phases either as solid or liquid at a given temperature and in a closed system.
What is the formula of lowering in vapour pressure?
Relative lowering in vapour pressure Then mole fraction of the solvent, X1 = N/(n+N) and mole fraction of the solute, X2= n /(N +n). Since the solute is non-volatile, it would have negligible vapour pressure. The vapour pressure of the solution is, therefore merely the vapour pressure of the solvent.
What is vapour pressure class 11?
Answer: Vapour pressure can be defined as the pressure exerted by a vapour with its condensed phases in a closed system at a given temperature. The equilibrium vapour pressure is a well-known measure of a liquid’s evaporation rate.
What is lowering and relative lowering of vapour pressure?
The relative lowering of vapor pressure is the ratio of lowering of vapor pressure to the vapor pressure of the pure solvent. Where, P1 and P2 are the vapour pressures of the solvent and the solute, respectively. Since, the solute is non-volatile, its contribution to the total vapour pressure will be zero, i.e. P2=0.
What is vapour pressure with example?
One of the best examples of vapour pressure in real life is the relative humidity experienced by a person in a particular area. The relative humidity can be defined as the ratio of the actual vapour pressure of water in the air to the saturated vapour pressure of water in the air.
What is vapour pressure in chemistry class 12?
The pressure exerted by vapours of liquid on the surface of the liquid when equilibrium is established between liquid and it’s vapour is called vapour pressure of a liquid.
What causes vapor pressure lowering?
When a solute is added to a solvent, the vapor pressure of the solvent (above the resulting solution) is lower than the vapor pressure above the pure solvent.
What is vapour pressure class 8?
Answer: Vapour pressure can be defined as the pressure exerted by a vapour with its condensed phases in a closed system at a given temperature. The equilibrium vapour pressure is a well-known measure of a liquid’s evaporation rate. The propensity of particles to escape from the liquid or a solid is known to be related.
What is Raoult’s Law Class 12?
Raoult’s law states that a solvent’s partial vapour pressure in a solution (or mixture) is equal or identical to the vapour pressure of the pure solvent multiplied by its mole fraction in the solution.