Advertisements
Advertisements
प्रश्न
State Raoult’s law for a solution containing volatile components. Write two characteristics of the solution which obey Raoult’s law at all concentrations.
उत्तर
Raoult's Law: According to Raoult's law, for a solution of two volatile liquids, the partial vapor pressure of each component of the solution is directly proportional to its mole fraction present in solution.
`"p"_1∝ "x"_1`
Implies that
`"P"_1="P"_1^circ "x"_1`
P1=Partial pressure of component 1.
x1 =mole fraction of component 1.
`"P"_1^circ`=pure vapour pressure of component 1.
Ideal solution obeys Raoult’s law at all concentrations.
The conditions obeyed are:
(i) ΔmixH=0
(ii) ΔmixV=0
APPEARS IN
संबंधित प्रश्न
State Raoult’s law for the solution containing volatile components
The vapour pressure of water is 12.3 kPa at 300 K. Calculate vapour pressure of 1 molal solution of a non-volatile solute in it.
Calculate the mass of a non-volatile solute (molar mass 40 g mol−1) which should be dissolved in 114 g octane to reduce its vapour pressure to 80%.
Define Raoult’s law for the elevation of the boiling point of a solution.
An aqueous solution of hydrochloric acid:
On the basis of information given below mark the correct option.
(A) In bromoethane and chloroethane mixture intermolecular interactions of A–A and B–B type are nearly same as A–B type interactions.
(B) In ethanol and acetone mixture A–A or B–B type intermolecular interactions are stronger than A–B type interactions.
(C) In chloroform and acetone mixture A–A or B–B type intermolecular interactions are weaker than A–B type interactions.
On the basis of information given below mark the correct option.
On adding acetone to methanol some of the hydrogen bonds between methanol molecules break.
Two liquids X and Y form an ideal solution. The mixture has a vapour pressure of 400 mm at 300 K when mixed in the molar ratio of 1 : 1 and a vapour pressure of 350 mm when mixed in the molar ratio of 1 : 2 at the same temperature. The vapour pressures of the two pure liquids X and Y respectively are ______.
If the weight of the non-volatile solute urea (NH2–CO–NH2) is to be dissolved in 100 g of water, in order to decrease the vapour-pressure of water by 25%, then the weight of the solute will be ______ g.
The vapour pressure of pure liquid X and pure liquid Y at 25°C are 120 mm Hg and 160 mm Hg respectively. If equal moles of X and Y are mixed to form an ideal solution, calculate the vapour pressure of the solution.
