Demo 1 – Energized Rxn’s
Hour ____ Date _______ Name __________________________
1. ________________________________________
Demo Description
Observations
a. Chemical equation: ____________________________________________
b. Draw a Reaction Energy Diagram. Appropriately label the X & Y axis.
Show the location of Reactants, Time, AE, Products, Energy, & ∆ HE.
_______________________ c. Of the 2 types of energy rxn’s, which is this?
_______________________ d. Of the 5 types of chemical rxn, which is this?
_______________________ e. Describe the ∆ HE? (Positive, Same, Negative)
_______________________ f. Is heat absorbed, released or no change?
_______________________ g. Describe AE. (None, Small, Medium, Large)
_______________________ h. Describe reactants energy. (None, Small, Medium, Large)
_______________________ i. Describe products energy. (None, Small, Medium, Large)
_______________________ j. Describe the products temperature.
(Very Cold, Medium Cold, Slightly Cold, No change,
Slightly Warm, Medium Hot, Very Hot)
2. ________________________________________
Demo Description
Observations
a. Chemical equation: ____________________________________________
b. Draw a Reaction Energy Diagram. Appropriately label the X & Y axis.
Show the location of Reactants, Time, AE, Products, Energy, & ∆ HE.
_______________________ c. Of the 2 types of energy rxn’s, which is this?
_______________________ d. Of the 5 types of chemical rxn, which is this?
_______________________ e. Describe the ∆ HE? (Positive, Same, Negative)
_______________________ f. Is heat absorbed, released or no change?
_______________________ g. Describe AE. (None, Small, Medium, Large)
_______________________ h. Describe reactants energy. (None, Small, Medium, Large)
_______________________ i. Describe products energy. (None, Small, Medium, Large)
_______________________ j. Describe the products temperature.
(Very Cold, Medium Cold, Slightly Cold, No change,
Slightly Warm, Medium Hot, Very Hot)
3. ________________________________________
Demo Description
Observations
a. Chemical equation: ____________________________________________
b. Draw a Reaction Energy Diagram. Appropriately label the X & Y axis.
Show the location of Reactants, Time, AE, Products, Energy, & ∆ HE.
_______________________ c. Of the 2 types of energy rxn’s, which is this?
_______________________ d. Of the 5 types of chemical rxn, which is this?
_______________________ e. Describe the ∆ HE? (Positive, Same, Negative)
_______________________ f. Is heat absorbed, released or no change?
_______________________ g. Describe AE. (None, Small, Medium, Large)
_______________________ h. Describe reactants energy. (None, Small, Medium, Large)
_______________________ i. Describe products energy. (None, Small, Medium, Large)
_______________________ j. Describe the products temperature.
(Very Cold, Medium Cold, Slightly Cold, No change,
Slightly Warm, Medium Hot, Very Hot)
4. ________________________________________
Demo Description
Observations
a. Chemical equation: ____________________________________________
b. Draw a Reaction Energy Diagram. Appropriately label the X & Y axis.
Show the location of Reactants, Time, AE, Products, Energy, & ∆ HE.
_______________________ c. Of the 2 types of energy rxn’s, which is this?
_______________________ d. Of the 5 types of chemical rxn, which is this?
_______________________ e. Describe the ∆ HE? (Positive, Same, Negative)
_______________________ f. Is heat absorbed, released or no change?
_______________________ g. Describe AE. (None, Small, Medium, Large)
_______________________ h. Describe reactants energy. (None, Small, Medium, Large)
_______________________ i. Describe products energy. (None, Small, Medium, Large)
_______________________ j. Describe the products temperature.
(Very Cold, Medium Cold, Slightly Cold, No change,
Slightly Warm, Medium Hot, Very Hot)
Demo Ideas
1. Steel Wool (see below)  exo
2. Gummy Bear (movie)  exo
3. Na + Cl (movie)  exo
4. Magnesium + HCl (see below)
5. 3rd Movie
6. Mg + O2 (burn in bunsen burner)  exo
7. Cold packs for atheletes  endo
8. Hot packs for hunters  exo
9. Add 15 g Ammonium Nitrate / NH4NO3(powder) to 100 ml of water  endo (this is like in a cold pack)
10. Ammonium Chloride NH4Cl dissolved in water endo
11. Water + KCl endo
12. Ethanoic acid with sodium carbonate – endo
13. reaction of thionyl chloride (SOCl2) with cobalt(II) sulfate heptahydrate - endo
14. reaction of barium hydroxide octahydrate crystals with dry ammonium chloride - endo
15. H3C6H5O7(aq) + 3 NaHCO3(s) --> 3 CO2(g) + 3 H2O(l) + NaC6H5O7(aq) Citric Acid + baking soda (sodium
bicarbonate).
16. BaOH + Ammonium Thiocynide – big endo (do for demo as it will freeze to wooden chair)
17. Alka Seltzer in Water – endo
18. Am
Mg + HCl
a. Place 30 ml of room temp. HCl into a 100 ml beaker. Record the room temp. ____________ OC
b. Place your hand on the outside of the beaker and feel its temperature.
c. Place a small strip of Mg into the beaker.
d. Feel the jar again. Record its temp. ____________ OC
-------------------------------------------------------------------------------------------------------------------------------------------Steel Wool + Vinegar
a. Record the room temperature. ____________ OC
b. Soak a piece steel wool in vinegar for 1 minute.
c. Squeeze the excess vinegar out of the steel wool.
d. Wrap the steel wool around the thermometer and place it in a covered container.
e. Wait 5 minutes and record the temperature. . ____________ OC
-------------------------------------------------------------------------------------------------------------------------------------------a. Place 25 g of NH4Cl in a large test tube. Add HCl.
-------------------------------------------------------------------------------------------------------------------------------------------a. Place 25 g of CaCl2 in a 250 ml beaker. Add HCl.
-------------------------------------------------------------------------------------------------------------------------------------------_______________________ h. Which starts out with more PE?
_______________________ i. Comparing the reactants and products, which has more PE?