Exo/Endo/Balanced Equations

Exothermic

100

A chemical reaction in which bonds form or break and release thermal energy

Exothermic Reactions

200

Particle motion will _______ in an exothermic reaction causing a ______ in temperature 

(Increase/Decrease)

Increase, Increase

300

Give an example of an exothermic reaction 

Answers will vary 

400

A glow stick is an exothermic reaction. Explain why

It gives off light and heat at the end of the reaction 

500

Jenny records the temperature of her reaction at different times. Describe the reaction as endothermic or exothermic

Time 1: 10 degrees

Time 2: 12 degrees 

Time 3: 16 degrees

Exothermic 

Endothermic

100

Dave records the temperature of his reaction at different times. Describe the reaction as endothermic or exothermic

Time 1: 10 degrees

Time 2: 15 degrees 

Time 3: 8 degrees

Endothermic

200

A chemical reaction in which bonds form or break and absorb thermal energy in the reaction

Endothermic Reaction

300

Give an example of an endothermic reaction

Answers Vary 

400

Making ice cream would be which kind of reaction? Endothermic or exothermic?

Endothermic 

500

What happens with the energy during an endothermicchemical reaction 

It is absorbed

Balancing Chemical Equations

100

What is the first thing to do when balancing equations?

Count the atoms on both sides of the equation

200

What is the only thing that can be changed in balancing a chemical reaction?

The coefficients  

300

Is this equation Balanced?

2H₇O₆ ----> 7H₂O + 6O₂

NO 

400

Balance the equation 

K + 2MgBr ---> KBr + Mg

2K + 2MgBr ---> 2KBr + 2mg

500

Balance the equation

NaBr + CaF₂----> NaF + CaBr₂

2NaBr + CaF_2----> 2NaF + CaBr₂

Counting Atoms

100

In this equation identify how many oxygen are on the reactant side 

2H₁₀O₆ ----> 4H₅O + 6O₂

12

200

In this equation identify how many Potassium (K) are on the reactant side 

3KMgNO₄ ----> 4KO₂ + 3MgN₂

3

300

4 NH₃ + 5 O₂ → 4 NO + 6 H₂O

How many Nitrogen (N) are on the product side 

4

400

In order for a chemical reaction to take place the atoms in the reactants must equal the atoms in the products. 

True or False

True 

500

HCl + K₂CO₃ → KCl + H₂O + CO₂

Count all the individual atoms on the reactant side 

H, Cl, K, C, O 

H: 1 

Cl: 1

K: 2

C: 1

O: 3

Exo/Endo

100

Exo Means ______

Endo Means _______ 

Exo: Exit 

Endo: into 

200

Bonds Break in the _____ and form in the _____of a chemical equation 

reactants, products 

300

NH₄NO₃  +  heat  →  NH₄  +  NO₃

Is this exothermic or endothermic 

Endothermic 

400

2H₂(g)  +  O₂(g)  →  2H₂O(l)  +  571.6kJ

Is this exothermic or endothermic?

Exothermic

500

Identify the following as exothermic or endothermic: 

A. Fireworks 

B. Photosynthesis 

C. Digestion

A. Exothermic 

B. Endothermic 

C. Exothermic