Question

When chemists convert ethene (C2H2) to ethanol (CH3CH2OH), they have a mixture of the two gaseous substances. Why do chemists then lower the temperature of the mixture? to collect liquid ethene and leave ethanol as a gas because ethene has stronger dipole-dipole forces to collect liquid ethene and leave ethanol as a gas because ethanol has stronger London dispersion forces to collect liquid ethanol and leave ethene as a gas because ethanol has hydrogen bonds to collect liquid ethanol and leave ethene as a gas because ethene has stronger London dispersion forces

Answer 1

The third option: to collect liquid ethanol and leave ethane as a gas because ethanol has hydrogen bonds .
The -OH present in ethanol is responsible of the hydrogen bonds. Main inter-molecular force of ethanol is the hydrogen bonds, which conferees ethanol a much higher boiling point than ethane`s. 

Answer 2

The chemists lower the temperature of the reaction to collect liquid ethanol and leaves ethene as ethanol has presence of hydrogen bonds. Thus, option C is correct.

The reaction for the formation of ethanol has been the hydration reaction of ethene. The ethene has been passed through the steam and the hydration results in the formation of ethanol and water molecules.

The intermolecular force present in ethene has been hydrogen bonding and covalent force. The intermolecular force in ethanol has been strong dipole-dipole interactions and hydrogen bonding.

Since, the bonds in ethene has been weaker, it has been easily converted to gas at lower temperatures.

Thus, with the lowering of temperature in the reaction chamber, liquid ethanol has been collected with the ethene as gas that leaves the container. Thus, option C is correct.

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