(a) When 1.5 g of a non-volatile solute was dissolved in 90 g of benzene, the boiling point of benzene is raised from 353.23 K to 353.93 K. Calculate the molar mass of the solute. (b) When fruits and vegetables that have dried up are placed in water, they swell and return tooriginal form. Why? Would temperature increase accelerate the process ?

(a) When 1.5 g of a non-volatile solute was dissolved in 90 g of benze

1.	(a) When 1.5 g of a non-volatile solute was dissolved in 90 g of benzene, the boiling point of benzene is raised from 353.23 K to 353.93 K. Calculate the molar mass of the solute. (b) When fruits and vegetables that have dried up are placed in water, they swell and return tooriginal form. Why? Would temperature increase accelerate the process ?
Answer» Solution :(a) ` Delta T_b = 353.93 - 353.23 = 0.7K` Molality of the solution ` = m = (1.5//M_B)/(90) xx 1000 = (1.5//1000)/(M_B xx 90) = (150)/(9M_B)` Applying the relation : `Delta T_b = K_b xx m` Substituting the VALUES in the above equation, we have `0.7 = 2.52 xx (150)/(9 M_B)` `M_B = (2.52 xx 150)/(0.7 xx 9) = 60` g/mol (b)Fruits and vegetables SWELL in water due to osmosis. An increase in temperature ACCELERATES the process of osmosis.