Endothermic and Exothermic Chemical Reactions and Rate of Reactions

Match the following Reaction Rate affect with the definition of why it speeds up reactions.

• Concentration

• This substance speeds the reaction rate by lowering the activation energy needed to start the reactions

• Surface Area

• The more of this causes there to be more room for the particles to collide and react with one another

• Catalyst

• Higher amounts of this of this leads to more frequent collisions between reactant particles

• Temperature

• The higher the ____ = the smaller of the volume, causing more particle collisions

• Pressure

• The higher the ______, the faster the reaction because more particles are moving and colliding, thus contacting with each other to react.

Tags

NGSS.HS-PS1-5

Match the following

• Endergonic

• ________ chemical reactions _____ energy in the form of heat

• Exergonic/ release

• ______ chemical reactions ______ energy

• absorb/ heat

• ______ chemical reactions absorb energy

• release/absorb

• Endothermic chemical reactions _____ energy in the form of _____

• Exothermic/ release

• All chemical reactions either ______ or_____ energy

Tags

NGSS.HS-PS1-4

How quickly a reaction will take place is called what?

• Reaction Rate

• Temperature

• Catalyst

• Pressure

Tags

NGSS.HS-PS1-5

What substance speeds up the reaction rate by lowering the activation energy needed to start the reaction?

• Concentration

• Catalysts

• Pressure

• Temperature

A chemical reaction in which energy is absorbed is ______________.

• an endothermic reaction

• an exothermic reaction

• a single replacement reaction

• a double replacement reaction

Tags

NGSS.HS-PS1-4

A chemical reaction in which energy is released or removed is ______________.

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

In the ice cream lab, what events support an endothermic reaction? Click all that apply.

• Ice water temperature increasing

• Ice water temperature decreasing

• Frost on the outside of the container

• Creamer turning into ice cream

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The minimum amount of energy needed for substances to react is called__________.

• Activation Energy

• Catalyst Energy

• Endothermic Energy

• Exothermic Energy

Which type of reaction absorbs more energy to break bonds than it releases?

• Combustion reaction

• Exothermic reaction

• Endothermic reaction

• Decomposition reaction

Tags

NGSS.HS-PS1-4

Where does the energy in a chemical reaction primarily come from?

• The surrounding environment

• The chemical bonds of atoms

• The energy of light

• Kinetic energy of particles

Tags

NGSS.HS-PS1-4