Exothermic and Endothermic Lesson

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Endothermic and Exothermic Reactions

Multiple Choice

In an endothermic reaction, heat is ...

• taken in or absorbed

• given out or released

Multiple Choice

In an exothermic reaction, heat is ...

• taken in
• given out

​Endothermic Reaction

• ​Energy is absorbed into the reaction

• Endo- means to be absorbed or to enter

• Surroundings usually feel cool

​Exothermic Reaction

• ​Energy is released into the reaction

• Exo- means to exit or to be released

• Surroundings usually feel hot

Multiple Choice

If a chemical reaction is endothermic, the temperature would ___ as it absorbs energy.

• Increase

• Decrease

• Stay the same

Multiple Choice

If a chemical reaction is EXOTHERMIC, the energy stored in the reactants is....

• the same as the products

• greater than the products

• less than the products

​Heat

• ​In exothermic reactions, heat moves out of the system.

• In endothermic reactions, heat moves into the system.

Multiple Choice

The process of photosynthesis is an ____ reaction.

• Endothermic

• Exothermic

Multiple Choice

If a chemical reaction produces light or sound, it is likely a _____ reaction.

• EXOthermic

• ENDOthermic

Multiple Choice

Baking bread and cooking an egg are examples of....?

• Endothermic processes
• Exothermic processess
• None of these 

Multiple Choice

Chemical bonds __________ energy when it breaks. (Reactants)

• absorbs

• releases

Multiple Choice

What type of reaction is shown in the photo?

• Exothermic

• Isothermic

• Endothermic

• None of the above

Multiple Choice

In terms of energy of reaction, which statement best explains how a the chemical reaction of a cold pack works?

• When the substances combine, they absorb energy from the surroundings during the

  reaction.

• When the substances combine, they releases energy from the surroundings during the

  reaction.

Multiple Choice

What type of reaction occurs in a hand warmer

• exothermic

• endothermic

Multiple Choice

In ENDOTHERMIC reactions, energy is _____ by the reaction system from the surroundings.

• Absorbed

• Released

• Eliminated

• Obliterated

Multiple Choice

In EXOTHERMIC reactions, energy is _____ from the reaction to the surroundings.

• Absorbed

• Released

• Eliminated

• Evaporated

Multiple Choice

In an endothermic reaction, energy is ---

• Absorbed

• Released

Multiple Choice

Chemical bonds __________ energy when new bonds are formed. (Products)

• release

• absorb

Multiple Choice

$$O_2\left(g\right)\ +\ 2\ H_2\ \left(g\right)\ \rightarrow\ 2\ H_2O\ \left(g\right)\ +\ Energy$$  

• endothermic

• exothermic

Multiple Choice

$$6\ CO_2+\ 6\ H_2O\ +\ Energy\ \rightarrow\ C_6H_{12}O_6\ +\ 6\ O_2$$

• endothermic reaction

• exothermic reaction

Multiple Choice

What type of reaction is this?

• Exothermic

• Endothermic

• Kinetic

• Potential