The best way to separate the mixtures out is through the process of fractional distillation.
In fractional distillation, liquid - liquid mixtures are separated based on the differences in boiling point of their components. Let us examine the boiling points of the component of the mixtures:
Ethanol 78⁰C
Glycerol 290⁰C
Ethylene glycol 197.6⁰C
Methanol 64.7⁰C
Water 100⁰C
We see that the liquids in the mixture have different boiling points. In this process, the mixture is heated in a distillation column. When the boiling point of any component is reached, it will rise up in the column and can be channeled to a condenser where it is cooled and collected.
The liquid with the least boiling point is first separated with the one with the highest boiling is recovered last:
The best description for the relationship between the products and the reactants in an exothermic reaction is C. The potential energy of the products is less than the potential energy of the reactants.
The energy release when dissolving 1 mol of NaOH in water is 445.1 kJ the mass of NaOH to be dissolved is 32.0 g The number of NaOH moles in 32.0 g - 32.0 g / 40 g/mol = 0.8 mol the energy released whilst dissolving 1 mol of NaOH - 445.1 kJ when dissolving 0.8 mol - the energy released is 445.1 kJ/mol x 0.8 mol therefore heat released is - 356.08 kJ answer is -356.08 kJ
