What is the difference between amorphous and crystalline solids? amorphous solids are highly structured, while crystalline solids are disorganized. amorphous solids are disorganized, while crystalline solids are highly structured. amorphous solids have well defined melting points, while crystalline solids do not. amorphous solids break along planes, crystalline solids break in irregular shapes.

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.