![]() ![]() Overall, the combination of a lower boiling point and weaker intermolecular forces in methylated spirit allows it to evaporate more rapidly than water. ![]() The weaker forces of attraction in methylated spirit make it easier for the molecules to break away from the liquid surface and enter the vapor phase. Although these forces are stronger than London dispersion forces, they are still weaker than the hydrogen bonding between water molecules. Ethanol molecules have a polar group (hydroxyl group) that enables both hydrogen bonding and dipole-dipole interactions. Record the data in the table below: Chemical Volume before Volume after (Zoom in and read the beakers) Change in Volume (subtract) Rank of evaporation 1 most Rank of IMF strength 1 strongest Finger Nail polish remover (acetone) Water Methylated Spirits (ethanol) The speaker says that acetone has London Forces. Methylated spirit contains ethanol, which has weaker intermolecular forces compared to water. Intermolecular forces: The intermolecular forces between molecules play a crucial role in determining the rate of evaporation. Water, on the other hand, needs to reach a higher temperature to evaporate.Ģ. This means that even at room temperature, methylated spirit molecules have enough energy to overcome the intermolecular forces holding them together and transition from liquid to vapor. The boiling point of methylated spirit is around 78☌ (172☏), while water boils at 100☌ (212☏) at sea level. Boiling point: Methylated spirit has a lower boiling point compared to water. Methylated spirit, also known as denatured alcohol, evaporates faster than water due to its lower boiling point and lower intermolecular forces. ![]()
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