Click a metal disk and watch the liquid crystallize. Younger students can safely feel the heat of a physical change. Advanced students can determine the heat of fusion of hydrated sodium acetate (fp = 54 o
C). Great for calorimetry experiments! Bending the metal disk initiates the crystallization of super-cooled sodium acetate and water; boiling in water returns the solid to a liquid. Can be used over and over. Instructions and lesson ideas provided! 10 x 10 cm (4 in. x 4 in.) Download the SDS of this product.
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Work great, kids loved them.
Oct 21, 2016 | By David of Surfside, FL United States
I wanna hold it!
Oct 24, 2014 | By LaDonna of San Antonio, TX United States
May 11, 2014 | By Tom Wellnitz of Decatur, GA United States
crystal energy device-totally awesome
Dec 19, 2013 | By Dr. Ann Abraham of Ashtabula, OH United States
Sep 13, 2012 | By Sarah Ludwig of Fond du Lac, WI United States
Great in a college lecture class!
Aug 21, 2012 | By Therese of Flagstaff, AZ United States
May 29, 2012 | By Jamie Flint of Houston, TX United States
May 29, 2012 | By D. Saccoliti of Colorado Springs, CO United States
Heat Up Your Students with Awe
May 22, 2012 | By Victoria Hornik-Rosinski of Allen Park, MI United States
May 21, 2012 | By Laura Koselak of Colorado Springs, CO United States
So many uses
May 16, 2012 | By Michele of Amarillo, TX United States
May 16, 2012 | By Lisa K of Avon, IN United States
May 16, 2012 | By Jared Ruddick of Philadelphia, PA United States
This product will support your students' understanding of the Next Generation Science Standards (NGSS)*, as shown in the table below.
Suggested Science Idea(s)
Students can analyze data obtained from testing different materials to determine which materials have the properties that are best suited for an intended purpose.
Students can use Chemical Heat Packs to make observations and measurements to identify materials based on their properties.
Students can use Chemical Heat Packs to conduct an investigation to determine whether the mixing of two or more substances results in new substances.
Students can analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
Students can use the Chemical Heat Packs to undertake a design project to construct, test, and modify a device that either releases or absorbs thermal energy by chemical process.
Students can use the Chemical Heat Packs to develop a model that predicts and describes changes in particle motion, temperature, and state of pure substance when thermal energy is added or removed.
DCI-MS/ETS1.B: Developing Possible Solutions-
A solution needs to be tested, and then modified based on the test results in order to improve it.
Students can use the Chemical Heat Packs to develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.
Students can use the Chemical Heat Packs as evidence to provide an explanation about the effects of changing the temperature or concentration of the reacting particles on the rate at which the reaction occurs.
Students can use the Chemical Heat Packs to construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the Periodic Table and knowledge of the patterns of chemical properties.
Students will observe and communicate scientific information about why the molecular-level structure is important in the functioning of a material.
Students can conduct simple tests using the Chemical Heat Packs to see, feel and better understand the physical change. Advanced students can determine the heat of fusion of hydrated sodium acetate.
Students can use the Chemical Heat Packs to conduct an investigation to determine whether the mixing of two or more substances results in new substances. Bending the metal disk initiates the crystallization of the super-cooled sodium acetate and water; boiling the pack in water returns the solid to a liquid. This can be done over and over again.
* NGSS is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of, and do not endorse, this product.