notes gb lab 08 endothermic and exothermic reactions
TRANSCRIPT
![Page 1: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/1.jpg)
Lab 8 Lab 8 “Endo and Exo The Reaction Twins”
![Page 2: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/2.jpg)
The student will investigate and understand chemical changes in matter
The student will be able to recognize that some types of chemical reactions require continuous input of energy (Endothermic) and others release energy (Exothermic)
![Page 3: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/3.jpg)
Endothermic ReactionExothermic Reaction
![Page 4: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/4.jpg)
A chemical reaction that requires continuous input of energy.
It feels cold.Endothermic reaction of barium hydroxide and an ammonium salt. Mix the two solids; they react, and the products dissolve in water of hydration. The reaction flask may be passed around for students to feel how cold it is.
![Page 5: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/5.jpg)
A chemical reaction that continuously releases energy.
It feels hot.Light Energy could be released in the exothermic reaction taking place in things such as glow sticks.
![Page 6: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/6.jpg)
Temperature change is an indicator or clue of a chemical reactionThe temperature change happens because of the combination of chemicals and energy
![Page 7: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/7.jpg)
There are two types of chemical reactions that cause a temperature changeEndothermic ReactionsExothermic Reactions
![Page 8: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/8.jpg)
Endothermic and Exothermic Reactions are shown using a line graph
![Page 9: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/9.jpg)
The graph is written as change in temperature over time
![Page 10: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/10.jpg)
In Endothermic Reactions, there is a decrease in temperature or a temperature drop.
![Page 11: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/11.jpg)
Endothermic Reactions require more energy to break the original chemical bonds and form new ones
![Page 12: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/12.jpg)
Energy is absorbed from the environment through a continuous input of energy and the product feels coldCold Packs
![Page 13: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/13.jpg)
Endothermic in Blue
![Page 14: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/14.jpg)
Exothermic Reactions give off energy in the form of thermal energy (heat). (increase in temperature)
![Page 15: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/15.jpg)
Exothermic Reactions require Less energy is to break bonds to form new onesBurning wood, paper, hand warmers
![Page 16: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/16.jpg)
We use a line graph to show the changes in endothermic and exothermic reactions
![Page 17: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/17.jpg)
Exothermic reaction in Green
![Page 18: Notes gb lab 08 endothermic and exothermic reactions](https://reader035.vdocuments.us/reader035/viewer/2022062303/558e52091a28ab5f0a8b45e5/html5/thumbnails/18.jpg)
The steeper the line(Slope) the faster the energy change