EndoExothermicReactionLab

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Difference (from prior author revision) (major diff, minor diff)

Added: 1a2

Energy in Chemical Reaction Notes and Lab Procedures

Changed: 3c4,9

FYI: ALL CHEMICAL REACTIONS REQUIRES CHANGE IN ENERGIES

Notes on Energy in Chemical Reactions.

a) [Potential Energy Diagrams for Exo and Endothermic Reactions], print out and take notes on or use space below

b)Video on Energy in Chemical Reactions, [Energy and Chemical Reactions]

General Note - ALL CHEMICAL REACTIONS REQUIRES CHANGE IN ENERGIES

Changed: 11c17

Activation Energy (AE)-

Activation Energy ( E _ac )-

Changed: 15,30c21

Directions for lab:

1. Add 1/2 teaspoon of barium hydroxide to a 100 ml beaker. Make (record) observation of chemical.

2. Add 1/2 teaspoon of ammonium chloride to this beaker. Make (record) observation of chemical before adding.

3. Using a large stirring rod, stir until reaction stops. Record observation as you are stirring. Make sure to feel the bottom of the beaker.

4. Clean-up: Dilute all material in the beaker and pour down sink. Put clean beaker in the back of room on the papers near the sinks.

Chemical Reaction (We will work on in class):

Observations:

Other notes:

Added: 36a28

Procedure for lab:

Added: 37a30,33

1. Add 1/2 teaspoon of barium hydroxide ( Ba₁(OH)_{2 (s)} ) to a 100 ml beaker. Make (record) observation of chemical.

2. Add 1/2 teaspoon of ammonium chloride ( NH₄Cl_{1 (s)} ) to this beaker. Make (record) observation of chemical before adding.

3. Using a large stirring rod, stir until reaction stops. Record observation as you are stirring. Make sure to feel the bottom of the beaker.

4. Clean-up: Dilute all material in the beaker and pour down sink. Then follow regular lab clean-up procedures.

Added: 38a35

Chemical Reaction (We will work on in class):

Changed: 41,44c38

Mini-Lab: Endothermic and Exothermic Reactions
Energy in Chemical Reaction Notes and Lab Procedures

Notes on Energy in Chemical Reactions.

a) [Potential Energy Diagrams for Exo and Endothermic Reactions], print out and take notes on or use space below
b)Video on Energy in Chemical Reactions, [Energy and Chemical Reactions]

General Note - ALL CHEMICAL REACTIONS REQUIRES CHANGE IN ENERGIES

PE_R - Potential Energy of Reactant , PE_P - Potential Energy of Product

Endothermic Reaction (PE_R > or < or = PE_P) -

Exothermic Reaction (PE_R > or < or = PE_P) -

Activation Energy ( E _ac )-

Heat of Reaction -

Other notes:

Procedure for lab:

1. Add 1/2 teaspoon of barium hydroxide ( Ba₁(OH)_{2 (s)} ) to a 100 ml beaker. Make (record) observation of chemical.
2. Add 1/2 teaspoon of ammonium chloride ( NH₄Cl_{1 (s)} ) to this beaker. Make (record) observation of chemical before adding.
3. Using a large stirring rod, stir until reaction stops. Record observation as you are stirring. Make sure to feel the bottom of the beaker.
4. Clean-up: Dilute all material in the beaker and pour down sink. Then follow regular lab clean-up procedures.

Chemical Reaction (We will work on in class):