What is the boiling point of ethanol during distillation?

Question

BlackTom AI · Accepted Answer

The question asks for the boiling point of ethanol during distillation, which is a standard reference value used in many lab settings.
Option a: 120°C — This is significantly higher than ethanol’s typical boiling point and would suggest a temperature above the point where ethanol vaporizes under normal atmospheric pressure; at 120°C ethanol would already be well into the boiling and possibly decomposing region, so this is incorrect.
Option b: 78°C — This matches the widely accepted boiling point of ethanol at 1 atm (approximately 78.37°C). Distillation often uses this value as a practical reference for when ethanol begins to vaporize and separate from the mixture, so this choice is correct.
Option c: 100°C — This is the boiling point of water, not ethanol. Confusing the two liquids leads to erroneous conclusions about separation during distillation, so this option is incorrect.
Option d: 64°C — This is lower than ethanol’s actual boiling point. If ethanol boiled at 64°C, it would start vaporizing much earlier, which does not align with established physical properties of ethanol, making this option incorrect.
In summary, understanding the canonical boiling point of ethanol at standard pressure helps identify option b as the correct choice, while the other values misrepresent ethanol’s phase-change behavior under typical distillation conditions.

What is the boiling point of ethanol during distillation?单项选择题

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What is the boiling point of ethanol during distillation?

What is the boiling point of ethanol during distillation?

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