Driving question : How does the molecular mass of an evaporating alcohol affect the rate of evaporation?

In this activity students investigate process evaporation. They use a temperature sensor to record temperature changes during evaporation of alcohols. They investigate how the molecular mass of evaporating alcohol affects the rate of evaporation.

Topic: States of matter,
Concepts: Change of state, Molecular mass, Rate of evaporation, Temperature of evaporation,
Grade level: Middle School (11-14 years),
Activity type: Data logging,
Sensors: Temperature sensor,
Interface requirements: Single analog sensor input,

The Student Worksheet gives investigation instructions for students.

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The Teacher Notes includes teacher commentaries such as didactical approach, exemplary questions, assignments and data analysis.

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The Science Background describes the scientific principles that underlie the activity.

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Coach Activity/Result file can be opened in the Coach 7 Program. This requires Coach 7 to be installed on your computer.

Download activity Evaporation of alcohols (.cma7) Download result (.cmr7)