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Methanol and ethanol differ only by one carbon and 2 hydrogens. Both have the hydroxyl group and, thus, have hydrogen bonding and dipole-dipole interactions. What makes them different are their London forces (London forces are directly proportional to the number of electrons in a molecule and molecular size). Since methanol is smaller than ethanol, there is a smaller intermolecular London force. Less force holing the molecules together means they're easier to be pulled apart, which implies a lower boiling point.

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12y ago
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14y ago

Because Methanol non-covalent interaction and in particular its hydrogen bonding is weak

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Q: Why does methanol have a lower boiling point than ethanol?
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Related questions

Why does the boiling point of methylated spirits drop?

The boiling point of methanol is lower than the boiling point of ethanol.


Why does methanol mix completely with ethanol?

Methanol and ethanol mix together well in part because they both have a low boiling point. Methanol and ethanol mixed together also metabolizes well.


What liquid is more volatile between ethanol methanol acetone dichloromethane and water?

Ethanol boiling point: 78.37 °C Methanol Boiling point: 64.7 °C Acetone Boiling point: 56 to 57 °C dichloromethane Boiling Point: 39.8-40.0°C Water Boiling Point: 100°C dichloromethane more volatile than the others


How do you remove methanol out of an ethanol mixture?

Methanol has a Boiling point under standard conditions of 64.7 °C, and ethanol of 78.4 °C. You I can boil off vapor and collect Methanol and Ethanol, and use that cooled back down to liquid form and preform a test.


Does ethanol has the lower boiling point?

It depends what chemical or compound you are comparing the boiling point to. Ethanol has an atmospheric pressure boiling point of 78.1 °C (172.6 °F). This is slightly lower than the boiling point of water at the same pressure, much lower than the boiling point of iron, much higher than the boiling point of bromine.


What is the boiling point of alchohol?

ethanol boils at 78.3 degrees Centigrade methanol boils at 64.7 degrees Centigrade


Difference between methanol and ethanol?

Methanol is CH3OH, ethanol is CH3CH2OH. Both are alcohols, ethanol has one carbon more (or a CH2 group more) and is less polar than methanol. Also ethanol has higher boiling point than methanol.


How the bolling point of methanol can be reduces?

You can either pressurize it or add to it another liquid with a lower boiling point.


What molecule has the highest boiling point methane chloromethane or methanol?

methanol


Is alcohol solution boiling point higher or lower than salt solution?

Lower. The boiling point of ethanol is 78 degrees C. Adding salt to water raises the boiling point of that solution above 100 degrees C.


Boiling point ethanol?

78.3 degrees Celsius is the boiling point of ethanol.


What effect does ethanol have on the boiling point of water?

The pure ethanol has the boiling point 78.5 celsius while water has 100 celsius so when water is added to ethanol its boiling point becomes increased.