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cookie chemistry

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by

julia Serra

on 8 January 2014

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Transcript of cookie chemistry

Cookie Chemistry
Descriptions:
- This chemical reaction was an endothermic reaction.
You can tell when a chemical reaction has taken place if a new substance is formed. Another way to tell if a chemical reaction has taken place is when the properties change. Some examples are change in color, form, and smell.
Ingredients:
1. butter 6. vanilla extract
2. eggs 7. baking soda
3. salt 8. flour
4. sugar 9. chocolate chips
5. brown sugar
Recipe:
2 1/4 cups of flour
1 teaspoon of baking soda
1 teaspoon of salt
1 stick of butter (melted)
3/4 cup of sugar
3/4 cup of brown sugar
1 teaspoon of vanilla extract
2 large eggs
2 cups of chocolate chips

by: Julia and Jillian section: yellow
- The chemical reaction used thermal heat to cook the cookies.
- The thermal heat caused the cookie dough to flatten out and form a cookie.
- In this chemical reaction an example of an inhibitor were the preservatives.
- In this chemical reaction an example of a catalyst was the heat given off from the oven.
How could you tell a chemical reaction was taking place?
=
Word equation:
chocolate chips
+
cookie dough
=
cookies
heat
+
=
Conclusion:
Chemical reactions involve two changes; change in form and change in energy. By doing this project I've learned a lot about chemical reactions. I learned that thermal heat can chemically change cookie dough into delicious cookies. This project showed me how baking cookies is an endothermic reaction. An endothermic reaction is a reaction in which energy is absorbed. I know this reaction is endothermic because it deals with thermal heat changing a substance. The project demonstrated how chemical reactions can change substances to new substances. The substance started out as a batter and transformed into a new substance. In conclusion, the most important thing I learned is that chemical reactions occur all around me everyday.
- Preheat oven to 375 degrees fahrenheit.
- combine dry ingredients.
- combine wet ingredients.
- add wet ingredients to dry.
- bake for 9 to 11 minutes
Full transcript