Handwarmer Project
In this project, the purpose was to make a chemical handwarmer that heated up with a reaction amd stayed warm for about 10 minutes. The winning product amongst the whole San Marin chemistry department, would have 100 units sold in the San Marin Student Store for whatever price they deemed was necessary to make a profit on the unit.
First off, we had to figure out what type of salt we wanted to use for our reaction within the handwarmer. After a series of labs and tests, we determined that the most efficient salt to use in our hamdwarmer was lithium chloride. Lithium chloride was the best choice for us because it increased the temperature fastest, stayed warm for a good amount of time, and was one of the cheaper salts that was displayed to us when we got to select which salt to use. Then we had to think of an idea to keep the heat inside of our handwarmer. We chose to have a small bag of Sodium Polyacrylate to absorb the heat and keep the bag warm.
The chemical reaction of sodium chloride amd water looks like this:
2LiCl(s) + 2H2O(l) -> 2Li(aq) + 2Cl(aq)
Now here is all of the planning that we did including brainstorming ideas that we eventually did not use:
https://www.scribd.com/book/305853841/Untitled
Reflection:
I thought that our handwarmer was one of the superior handwarmers that was presented. I thought it was just the right price that will entice students to buy the product. I think that our unit was unique in its structure and design and that we should still present it as a possible opportunity to sell in the Student Store. We had our ups and downs as a group, as any group always has. I felt that the group as a whole could have done a better job at managing the time we had in class to create the best handwarmer possible. I also really liked all the ideas that we had going and felt we could have made a bunch of different handwarmers just based on our ideas alone. This project as a whole was really fun because we just got to be free and dream up any kind of idea we wanted and created something really special. I'd definitely recommend this project again for next year.
First off, we had to figure out what type of salt we wanted to use for our reaction within the handwarmer. After a series of labs and tests, we determined that the most efficient salt to use in our hamdwarmer was lithium chloride. Lithium chloride was the best choice for us because it increased the temperature fastest, stayed warm for a good amount of time, and was one of the cheaper salts that was displayed to us when we got to select which salt to use. Then we had to think of an idea to keep the heat inside of our handwarmer. We chose to have a small bag of Sodium Polyacrylate to absorb the heat and keep the bag warm.
The chemical reaction of sodium chloride amd water looks like this:
2LiCl(s) + 2H2O(l) -> 2Li(aq) + 2Cl(aq)
Now here is all of the planning that we did including brainstorming ideas that we eventually did not use:
https://www.scribd.com/book/305853841/Untitled
Reflection:
I thought that our handwarmer was one of the superior handwarmers that was presented. I thought it was just the right price that will entice students to buy the product. I think that our unit was unique in its structure and design and that we should still present it as a possible opportunity to sell in the Student Store. We had our ups and downs as a group, as any group always has. I felt that the group as a whole could have done a better job at managing the time we had in class to create the best handwarmer possible. I also really liked all the ideas that we had going and felt we could have made a bunch of different handwarmers just based on our ideas alone. This project as a whole was really fun because we just got to be free and dream up any kind of idea we wanted and created something really special. I'd definitely recommend this project again for next year.