Chemistry · Solutions, Mixtures & Activities · The First Law & Thermochemistry
Problem
In a solvent S, a compound B is partially dissociated into C and D as given below: B ⇌ 2C + 2D. B, C and D are non-volatile in nature. The molar mass of B is 10 times the molar mass of S. The standard boiling point and the standard enthalpy of vaporization of S are 400 K and 10R J mol⁻¹, respectively (R is the gas constant in J K⁻¹ mol⁻¹). A solution of B in S with an initial concentration of B as 0.25% (mass/mass) has a boiling point of 408 K at 1 bar pressure. In this solution, the mole percent of B that has been dissociated is ____ .