Endo and Exothermic Reactions

What is the change on the temperature in the reaction between water and ammonium nitrate?

• +5 °C

• -5 °C

• -4 C°

• +4 °C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Safia investigates endothermic and exothermic reactions. She mixes different chemicals together and records the temperature change. Based on the results, which reaction is exothermic?

• The first one only.

• The second one only.

• The third one only.

• The first and the third.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Changes can be exothermic or endothermic.

What is meant by the word exothermic?

Tags

NGSS.HS-PS1-4

The ice melting to form liquid water is an example of...

• an exothermic reaction because it releases heat.

• an endothermic reaction because it releases heat.

• an exothermic reaction because it absorbs heat.

• an endothermic reaction because it absorbs heat.

Tags

NGSS.MS-PS1-4

Mike tests four solids A, B, C and D. He adds each solid to 10 cm3 of water. He measures the temperature of the water at the start.He then stirs the mixture and measures the temperature of the water again. Here is his results table. Which solid gives the endothermic change?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Chemical reactions can grouped up as endothermic and exothermic reactions. Give two example of each one of them.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

During an exothermic reaction, heat is _________ and chemical bonds __________.

• released, formed

• absorbed, broken

• released, broken

• absorbed, formed

Tags

NGSS.HS-PS1-4

During an endothermic reaction, heat is ________ and chemical bonds _______.

• released, formed

• absorbed, broken

• released, broken

• absorbed, formed

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Have you ever eaten sherbet sweets? 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.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-5

When a candle is lit hydrocarbons are combusting. An exothermic reaction is occuring. Energy is being _________________ .

• absorbed

• frozen

• destroyed

• released

Tags

NGSS.HS-PS1-4