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Boiling in a Syringe—Demonstration Kit

By: The Flinn Staff

Item #: AP7448 

Price: $23.26

In Stock. Future shipment is available.

The Boiling in a Syringe Chemical Demonstration Kit encourages students to explore phase change and vapor pressure in a dramatic demonstration. Water always boils at 100 °C, right? Not always. Students discover the reasoning behind the answer.

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Product Details

Water always boils at 100 °C, right? Not always! Water boils at 100 °C at 1 atmosphere of pressure. Every liquid boils at the temperature at which its vapor pressure equals the pressure above its surface. Change the pressure, and the required boiling temperature changes! Explore both phase change and vapor pressure in this very dramatic demonstration. By decreasing the vapor pressure inside the syringe, hot water can be boiled at less than 100 °C. As the water boils, the vapor is pressurizing the area above the liquid. The water will continue to boil until the pressure equals that of the vapor pressure or until no liquid is left. Includes Teacher Demonstration Notes, reproducible student handouts and a detailed discussion section.

Concepts: Vapor pressure, boiling, phase change. Time Required: 10 minutes Materials Provided: Demonstration syringe (120-mL) and stopcock with Luer Lock adapter


Materials Included in Kit: 
Demonstration syringe, 120 mL
Replacement stopcock

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Asking questions and defining problems
Developing and using models
Planning and carrying out investigations
Constructing explanations and designing solutions

Disciplinary Core Ideas

MS-PS1.A: Structure and Properties of Matter
MS-PS3.A: Definitions of Energy
MS-PS3.B: Conservation of Energy and Energy Transfer
HS-PS1.A: Structure and Properties of Matter
HS-PS3.A: Definitions of Energy
HS-PS3.B: Conservation of Energy and Energy Transfer

Crosscutting Concepts

Cause and effect
Systems and system models
Energy and matter
Stability and change

Performance Expectations

MS-PS1-4. Develop a model that predicts and describes changes in particle motion, temperature, and state of a pure substance when thermal energy is added or removed.
HS-PS1-5. Apply scientific principles and evidence to provide an explanation about the effects of changing the temperature or concentration of the reacting particles on the rate at which a reaction occurs.