Exothermic and Endothermic Reactions and Profiles

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?

• It is an exothermic reaction

• It is an endothermic reaction

Tags

NGSS.MS-PS1-4

HCl reacts with Zn giving off heat

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

In an endothermic reaction, heat is ...

• taken in

• given out

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following are examples of an Exothermic Reaction?

• Cooking an egg

• Plants making sugar through photosynthesis

• Dynamite exploding

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-5

Is photosenthysis an Exothermic or an Endothermic reaction?

• Endothermic

• Exothermic

Tags

NGSS.MS-LS1-6

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.MS-PS1-2

NGSS.MS-PS1-4

What instrument would you use to detect an endothermic or exothermic reaction?

• triple beam balance

• ruler

• thermometer

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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

• absorbed

• frozen

• destroyed

• released

Tags

NGSS.MS-PS3-5

The initial temperature was measured to be 20^oC and the final temperature was 10^oC. The reaction was

• exothermic

• endothermic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

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

• Endothermic processes

• Exothermic processess

• None of these 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4