For you people that had the shame of missing our class, or just aren't part of it (which is also a shame), here is a definition of both:
- Exothermic Reaction: A change in which energy (or NRG) is released.
- Endothermic Reaction: A change in which energy is taken in.
So, the purpose question was "How do measured temperatures show the difference between an exothermic and endothermic reaction?"
In the actual lab, we mixed Yeast with Hydrogen Peroxide, and Baking Soda with Vinegar.
Yeast and Baking Soda being the Solutes, and Hydrogen Peroxide and Vinegar being the Solvents.
After consulting it with ms.D, we decided that the independent variable of the lab was temperature, and that the dependent variable of the lab were the endothermic and exothermic reactions.
The result of the first experiment was that Yeast and Hydrogen Peroxide became instantly very bubbly and hot, and stunk like rotten bread.
The second experiment was a bit slower, as the chemical reaction took longer to occur. The result was lots of bubbles and the container becoming cold.
All of the experiments went without any injury and everyone left with good data.
The whole lab is in our Chemistry Packet, so check it out!
If you still don't understand the difference between endothermic and exothermic reactions, here is a link showing some simple examples of them.
Thank you for reading my scribe post. I hope you enjoyed it and that it was helpful.
The next scribe is... well, I can't find the list of available scribes, so I'll have to ask ms.D.