Question

Liquid A is known to have a lower viscosity and lower vapor pressure than Liquid B. Use these facts to predict the result of each experiment in the table below, if you can. experiment predicted outcome F will be greater than FB 40.0 mL of Liquid A are poured into a beaker, and 40.0 mL of Liquid B are poured F will be less than FB into an identical beaker. Stirrers in each beaker are connected to motors, and the F will be equal to F forces F and Fg needed to stir each liquid It's impossible to predict whether F or Fg will at a constant rate are measured. 40.0 mL of Liquid A are put in one sealed 5 L flask, and 40.0 mL of Liquid B are put in another sealed 5 L flask. The pressure in each flask is then slowly lowered with a vacuum pump. be greater without more information. Eventually both liquids boil, A first and then B. Eventually both liquids boil, B first and then A. Neither liquid will boil It's impossible to predict whether eitherliquid boils without more information.

Answer 1

Answer 1

As A is less viscose, it will be easier to stir. So, less force will be required.

Hence, Fa will be less than Fb. (Option 2)

Answer 2

Vapor pressure of A is less than that of B.

So, on lowering the external pressure, vapor pressure of B will approach equal to external pressure first and hence, it will boil first.

Hence, both will boil but B will boil first (option 2)

Answer 3

Dispersion forces occur between any two molecules.

Hydrogen bonding takes place between H atom and atoms such as N,F or O.

Dipole dipole forces occur between polar molecules

Ammonia : Dipole-dipole, dispersion, hydrogen bonds

CH3F: Dipole-dipole, dispersion, hydrogen bonds

Iodine molecules : Dispersion

Nitrogen trifluoride : Dipole-dipole, dispersion