Vapour Pressure of Liquid Solutions — Prelims Questions
The vapour pressure of pure benzene at a certain temperature is 0.850 bar. A non-volatile, non-electrolyte solid weighing 0.5 g when added to 39.0 g of benzene (molar mass 78 g/mol) gives a solution whose vapour pressure is 0.845 bar. What is the molar mass of the solid substance?
At 25 \text{°C}, the vapour pressure of pure water is 23.76 mmHg. If 100 g of urea (NHCONH, molar mass 60 g/mol) is dissolved in 850 g of water, what will be the vapour pressure of the solution?
Which of the following mixtures shows a positive deviation from Raoult's Law?
Which of the following statements is INCORRECT regarding an ideal solution?
The vapour pressures of pure liquids A and B are 450 mmHg and 700 mmHg, respectively, at 350 K. If the total vapour pressure of an ideal solution formed by mixing A and B is 600 mmHg, what are the mole fractions of A and B in the liquid phase?
Which of the following conditions is characteristic of a solution showing negative deviation from Raoult's Law?
An azeotropic mixture of two liquids has a boiling point lower than either of the pure liquids. This type of azeotrope is formed by solutions showing: