Endothermic and Exothermic Chemical Reactions and Rate of Reactions

Chemical reactions that absorb thermal energy.

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

Chemical reactions that release thermal energy.

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Process in which atoms of one or more substances rearrange to form one or more new substances.

• chemical reaction

• chemical equation

• chemical bond

• chemical balance

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In an endothermic reaction...

• Energy is absorbed

• Energy is released

• There is a net decrease in energy

• There is less energy in the products than the reactants

Tags

NGSS.HS-PS1-4

reactions absorb energy around it making the area feel 'colder.' reactions release energy to the surrounding area making the area feel 'warmer.'

• Endothermic

• Exothermic

• Isothermic

Tags

NGSS.HS-PS1-4

Some chemical reactions are ​ (a)   where the heat energy is absorbed. Other chemical reactions release heat energy are known as ​ (b)   .​

• endothermic

• exothermic

• thermal

• geothermal

Tags

NGSS.HS-PS1-4

In an endothermic reaction, energy is

(a)  

• absorbed

• released

Tags

NGSS.HS-PS1-4

require(s) the addition of energy for a reaction to occur.

• Endothermic Reactions

• Exothermic Reactions

• Combustion Reactions

• Condensation

Tags

NGSS.HS-PS1-4

Endothermic reactions ​ (a)   energy and exothermic reactions ​ (b)   energy.

• store

• release

Answer explanation

Endothermic reactions absorb or take in energy from their surroundings, hence the correct answer for the first blank is 'absorb'. On the other hand, exothermic reactions release energy into their surroundings, hence the correct answer for the second blank is 'release'.

Tags

NGSS.HS-PS1-4

In an exothermic reaction...

• Energy is absorbed

• There is a net increase in energy

• There is less energy in the products than the reactants

• There is more energy in the products than the reactants

Tags

NGSS.HS-PS1-4