Factors Affecting Reactions

The rate of a chemical reaction is NOT affected by which of the following:

• temperature
• concentration
• particle size (surface area)
• All of these affect reaction rates

Tags

NGSS.HS-PS1-5

The rate of a reaction increases as temperature__________________.

• Decreases
• Increases
• Stays the Same

Tags

NGSS.HS-PS1-5

Products will form faster if____________

• the particle size of the reactants are larger.
• temperature is decreased.
• concentration of the reactants are increased.
• the reaction is not stirred.

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 

• catalyst
• product
• reactant
• solute

Tags

NGSS.HS-PS1-5

Catalysts permit reactions to proceed along a ___________energy path.

• lower
• higher

Tags

NGSS.HS-PS1-4

Smaller particle size allows for a _________ surface area to be exposed for the reaction.

• larger
• smaller

The ___________ the surface area of the reactants, the faster the reaction rate.

• larger 
• smaller

Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles.

• false
• true

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Usually lowering the temperature will slow down a reaction.

• false
• true

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Exothermic reactions release heat to the surroundings.

• true
• false

Tags

NGSS.HS-PS1-4