Exothermic and Endothermic Reactions

Which term describes a chemical reaction that requires an input of energy?

• endothermic reaction

• exothermic reaction

• a catalyst

• an inhibitor

Tags

NGSS.HS-PS1-4

Because endothermic reactions absorb heat from the surroundings, they usually feel-

• hot

• cold

• dry

• moist

Tags

NGSS.MS-PS1-4

a chemical reaction in which energy is released to the surroundings is a(n)

• exothermic reaction

• endothermic reaction

• product

• reactant

Tags

NGSS.MS-PS1-4

In a(n) ​​ (a)   reaction, energy (or heat ) is absorbed. In a(n) ​ (b)   reaction, energy (or heat) is released.

• exothermic
• endothermic
• chemical 
• physical

Tags

NGSS.HS-PS1-4

sort each into the correct category:

Groups:

(a) Exothermic

,

(b) Endothermic

• reactants ---> energy + products

• decrease in temperature

• bonds are formed

• calcium chloride and water

• photosynthesis

• baking cookies

• baking soda and lemon juice

• 
• 
• iron rusting

• reactants + energy ---> products

• bonds are broken

• increase in temperature

• beef liver and hydrogen peroxide

Tags

NGSS.HS-PS1-4

Match the following vocabulary words:

• product

• the process by which one or more substances change to produce one or more different substances

• reactant

• a substance that takes part in and undergoes change during a reaction

• exothermic

• a substance produced during a chemical reaction

• endothermic

• a process in which heat is released

• chemical reaction

• a process in which heat is absorbed

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Match the following vocabulary words:

• thermal energy

• the total kinetic (motion) energy of the particles that make up matter

• gas

• A state of matter that has no definite shape but has a definite volume.

• kinetic energy

• The energy transferred between objects that are at different temperatures

• liquid

• energy of motion

• heat

• a form of matter that does not have a definite volume or shape

Tags

NGSS.HS-PS3-4

What is the effect on temperature when an exothermic reaction occurs?

• The temperature decreases

• The temperature fluctuates

• The temperature increases

• The temperature remains constant

Tags

NGSS.HS-PS1-4

Which type of reaction is characterized by the absorption of energy from the surroundings?

• Neutralization reaction

• Exothermic reaction

• Endothermic reaction

• Combustion reaction

Tags

NGSS.HS-PS1-4

In an exothermic reaction, energy is typically released in the form of-

• heat

• light

• sound

• electricity

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-5