Rate of Reactions

In an exothermic reaction, heat is ...

• taken in

• given out

Tags

NGSS.HS-PS1-4

In an endothermic reaction, heat is 

• taken in
• given out

Tags

NGSS.HS-PS1-4

A substance that increases speed of chemical reaction without being being changed is called:

• Catalyst

• Acid

• Base

Tags

NGSS.HS-PS1-5

What is activation energy?

• The energy needed for a reaction to occur

• The energy added by a catalyst

• The energy possessed by the products

What happens to the rate of a reaction when the temperature increases?

• The reaction rate slows down because the molecules are moving faster.

• The reaction rate slows down because the molecules are moving slower.

• The reaction rate goes faster because the molecules are moving faster.

• The reaction rate goes faster because the molecules are moving slower.

Tags

NGSS.HS-PS1-5

The amount of a substance in a given volume.

• concentration
• temperature
• surface area
• catalyst

Tags

NGSS.HS-PS1-5

Breaking a sugar cube into pieces of granulated sugar results in a change in the...

• concentration

• surface area

• temperature

• reactants

Tags

NGSS.MS-PS1-2

Exposing more particles for collisions (breaking big pieces into smaller pieces) is an increase in 

• concentration

• surface area

• temperature

• catalyst

Increasing the concentration increases the speed of reaction by

• lowering activation energy

• increasing collisions

• speeding up the reactants

• exposing more reactant

Tags

NGSS.HS-PS1-5

Which factors increase the rate of a reaction.

• increasing temperature
• increasing concentration
• increasing surface area
• all of these

Tags

NGSS.HS-PS1-5