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How Cold Can You Go?
| Content Provider | TeachEngineering: STEM curriculum for K-12 |
|---|---|
| Author | Koniges, Ursula Huertas, Leonarda Johnson, Donna Caeti, Ryan Mamasheva, Elina |
| Copyright Year | 2013 |
| Description | Students explore materials engineering by modifying the material properties of water. Using either a simple thermometer or a mechatronic temperature sensor, students learn about the lower temperature limit at which liquid water can exist—such that even if placed in contact with a material much colder than 0 degrees Celsius, liquid water does not get colder than 0 °C. Students explore materials engineering by modifying the material properties of water. Specifically, they use salt to lower the freezing point of water and test it by making ice cream. Using either a simple thermometer or a mechatronic temperature sensor, students learn about the lower temperature limit at which liquid water can exist—such that even if placed in contact with a material much colder than 0 degrees Celsius, liquid water does not get colder than 0 °C. This provides students with an example of how materials can be modified (engineered) to change their equilibrium properties. They observe that when mixed with salt, liquid water's lower temperature limit can be dropped. Using salt-ice mixtures to cool the ice cream mixes to temperatures lower than 0 °C works better than ice alone. |
| Language | English |
| Access Restriction | Open |
| Rights Holder | Regents of The University of Colorado Polytechnic Institute of New York University |
| Subject Keyword | Chemistry Phase Equilibrium Physical Properties Freezing Point Ice Cream Material Properties Freezing Mechatronics Temperature Phase Transition Thermometer |
| Content Type | Text |
| Time Required | PT45M |
| Education Level | Class III Class IV Class V |
| Pedagogy | Experimental Activity |
| Resource Type | Hands-on |
| Subject | Chemistry |
