Endothermic Exothermic Lab Template Es

Endothermic and Exothermic Reactions Portfolio Directions Unit 3 Lesson 5 Materials:  Apple Cider Vinegar  Baking Soda  Food thermometer  2 Bowls  1 TBS measurer  Microwave Suggested reactants: da, baking powder, antacid tablets, yeast, powdered candy straws, tooth paste (Do not use any hazardous solids.)

(Do not use bleach, ammonia, or other hazardous liquids.) ***Bleach and Ammonia can give off harmful gases when mixed with certain chemicals*** Introduction: If you add Baking Soda to apple cider vinegar, will the temperature rise or fall? In this experiment, I will add baking soda to vinegar to apple cider vinegar and see it it lowers the temperature of the vinegar.An exothermic reaction is one that does not require as much energy to create a chemical reaction so it puts that energy into the enviorment and does this more than absorbing it. An endothermic reaction is one that absorbs more energy than it gives off into the environment. Activation energy is the intital booast of energy that a chemical reaction gets when it first starts. You can think of it as when you first start chewing gum and you have the initial burst of flavor but than after a while, it starts to feel like it has dimmed down. Thermal energy is transferred by touching and by heat?

Hypothesis: If I add baking soda to apple cider vinegar, then the temperature of the substances together will drop. Procedure: List the steps of your experiment. This is your recipe so give enough details so the reader can repeat the experiment and get similar results. Also include safety procedures.

1. 2. 3. 4.

First, You can measure 3 TBS of baking soda to a bowl. Then you can put 3 TBS of Apple Cider vinegar to a different bowl. Heat up the apple cider vinegar for 20 seconds in a microwave ( if cold) Measure what the temperature of the apple cider vinegar is , with your thermometer. 5. Add the baking soda to the apple cider vinegar bowl and mix the substances and measure the temperature. Leave about ¾ TBS in the bowl when you pour in the baking soda to the ACV. 6. Record your data and clean up your entire workspace and wash your hands.

Data: Four effectiveness criteria are well executed: 1. 2. 3. 4.

appropriate data table setup, detailed observations before reaction, detailed observations during the reaction, detailed observations after the reaction

Reaction Baking Soda + Vinegar

Observations before reaction Baking soda= kind of clumpy and white and cold ACV= clearish with brown col rut kind of yellow/orange 120 Degrees F

Observations during reaction It made the vinegar bubble up. It bubbled up about an inch.

Observations after reaction It sank to the bottom of the bowl It sat down quickly after the reaction and mixed a little with the baking soda. I believe the temperature fropped by 10 degrees or to 90 degrees F.

Conclusion: 1. When the baking soda was added to the ACV, the temperature seemed to drop by 10-30 degrees but this could have just been because the

temperature started to cool after being out of the microwave My hypothesis could have been correct but you may need more tests to prove this and more exact ones too . 2. What forms can energy take as its being released during a chemical reaction? Energy can take the form of bubbles or a gas. 3. Which type of reaction releases more heat than it absorbs: endothermic or exothermic? Exothermic reactions release more energy than endothermic reactions. 4. What is activation energy? Activation energy is the initial burst of energy that happens in the beginning of a chemical reaction.