Study of the Vaporization Behavior of the Water-Ethyl Alcohol System at Room Temperature

April 5, 2026BUNSEKI KAGAKUOpen Access

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Key Points

This study aims to analyze the vaporization behavior of the water-ethyl alcohol system at room temperature.
Used a petri dish with a diameter of 28mm containing approximately 5cm3 of ethyl alcohol solution.
Measured vaporization amount using an electronic balance and temperature changes with a digital thermometer.
Examined the relationship between temperature drop and the weight ratio of ethyl alcohol to water.
The weight ratio of vaporized ethyl alcohol and water reached a stable value around 30wt%, correlating to a molecular weight ratio of 1:1.
Significant temperature drop observed when the weight ratio exceeded 1.5.
Maximum temperature increase due to dissolution heat was observed at approximately 30wt% ethyl alcohol solution.

Examines vaporization behavior in water-ethyl alcohol system, suggesting new insights into its thermal dynamics.

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Hiroyuki Noda (2026) studied this question.

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