Chemical Reactions Endothermic and Exothermic

To classify reactions: Consider the object involved in a reaction[the system] and the environment [the surroundings]. An exothermic reaction releases heat into the surroundings; an endothermic reaction takes in heat from the surroundings.

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• I need practice.

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NGSS.HS-PS1-4

NGSS.HS-PS3-4

In an exothermic reaction, heat is ...

• taken in
• given out

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NGSS.HS-PS1-4

In an endothermic reaction, heat is ,,,

• taken in
• given out

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NGSS.HS-PS1-4

What type of reaction occurs in a hand warmer

• exothermic
• endothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Identify the reaction type when evaporation occurs in a liquid 

• Endothermic reaction
• Exothermic reaction

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NGSS.MS-PS1-4

A liquid evaporates into a gas by ______ heat to the liquid. 

• adding
• giving off

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NGSS.MS-PS1-4

Identify the reaction type when evaporation occurs in a liquid 

• Endothermic reaction
• Exothermic reaction

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NGSS.MS-PS1-4

Condensation and raining are examples of what type of reaction?

• Exothermic
• Endothermic

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NGSS.MS-ESS2-4

NGSS.MS-PS1-4

Condensation: a gas changing to a liquid
Raining: a gas changing to a liquid
Both are _______ reactions.

• Exothermic
• Endothermic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Condensation: a gas must _____ heat to change to a liquid
Raining: a gas must _____heat to change to a liquid

• give off
• take in

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5