Endothermic Exothermic Reactions

If a chemical reaction is EXOTHERMIC, the temperature of the surrounding would....

• Stay the same

• Increase

• Decrease

Tags

NGSS.HS-PS1-4

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

• The temperature did not change.

• It is an endothermic reaction

• It is an exothermic reaction

• Energy is released from the reaction into the surrounding.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

Baking bread and cooking an egg require an input of heat. These would be examples of....?

• Endothermic processes

• Exothermic processess

• None of these

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Photosynthesis takes place inside of leaf cells. Sunlight is required. Is this an Exothermic or an Endothermic reaction?

• Endothermic

• Exothermic

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?

• It is an exothermic reaction

• It is an endothermic reaction

• It is made of ice

• It is dissolving your mouth

Tags

NGSS.HS-PS1-4

During a particular chemical reaction it takes 100 Kj of energy to break all the bonds and 150 Kj of energy is released when the new bonds form. Which is true about the overall reaction?

• It is endothermic and absorbs energy.

• It is exothermic and releases 150 Kj

• It is exothermic and releases 50 Kj

• It is endothermic and releases energy.

Tags

NGSS.HS-PS1-4

In an endothermic reaction, heat is ...

• absorbed

• released

Tags

NGSS.HS-PS1-4

What type of reaction occurs in hand warmers?

• exothermic

• endothermic

Tags

NGSS.HS-PS1-4

_____ reactions usually feel hot!!

• endothermic

• exothermic

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4