GC - Hand Warmer Write-up

Name:____________________

Hand Warmer Writing Assignment

You have just finished building a device out of materials you can find around your home that works as a hand warmer. How did you do it? Why does it work? Write two paragraphs that discuss your device. The first paragraph should be about the science of your hand warmer. It should at least answer these questions in complete sentences and paragraph form:

What substance did you use to make your handwarmer “get hot” and why did you choose it from the 3 substances we tested?
Why does this substance make your handwarmer “get hot”? (Discuss the flow of energy in your device)

The second paragraph should be about the design of your hand warmer. It should at least answer the following questions:

What did your device have to accomplish? (Be specific)
What materials did you use to build your device?
How did the materials and the design you chose meet the requirement you had to accomplish?

For this you may use all of your notes, heat of solution lab, NaCl CER activity, discussion from class, textbook, and/or online research.

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