Directions:
You are going to create a model of the endothermic and exothermic reactions we saw in the lab (baking soda + vinegar; elephant toothpaste). You need to show what is happening to the reactant molecules and how energy is released and absorbed to create the products. Here are the equations for each of those reactions. Baking Soda and Vinegar C2H4O2 + NaHCO3 ----> NaC2H3O2 + H2O + CO2 Elephant Toothpaste 2 H2O2 ----> 2H2O + O2 Remember to show what is happening with the molecules and energy associated with breaking and reforming bonds. Here is the link to the animations we watched to help you!
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NGSS Performance ExpectationsMS-PS1-2.Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred. |