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Item #: AP1933

Price: $8.50

In Stock.

The Heat Solution Instant Handwarmer Thermodynamics Chemistry Demonstration is fun and reusable. If pressure is applied to an activator, a crystal forms in a supersaturated solution of sodium acetate. This causes a solution to crystallize.

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Product Details

A vinyl pouch contains a supersaturated solution of sodium acetate. When pressure is applied to a metal activator, a seed crystal forms in the solution and triggers the entire solution to crystallize. As the solution changes physical state (liquid to solid), it increases in temperature to 130 ºF. The heat will last for over 30 minutes. The vinyl pouch can be easily regenerated and used over and over again.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Obtaining, evaluation, and communicating information
Developing and using models

Disciplinary Core Ideas

MS-PS1.A: Structure and Properties of Matter
MS-PS1.B: Chemical Reactions
MS-PS3.A: Definitions of Energy
MS-PS3.B: Conservation of Energy and Energy Transfer
MS-PS3.D: Energy in Chemical Processes and Everyday Life
HS-PS1.A: Structure and Properties of Matter

Crosscutting Concepts

Cause and effect
Energy and matter

Performance Expectations

MS-PS1-2: Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
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.
MS-PS1-5: Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.
MS-PS1-6: Undertake a design project to construct, test, and modify a device that either releases or absorbs thermal energy by chemical processes.
HS-PS3-2: Develop and use models to illustrate that energy at the macroscopic scale can be accounted for as a combination of energy associated with the motion of particles (objects) and energy associated with the relative position of particles (objects).