Rates

What type of reaction is this?

• Endothermic
• Exothermic

Tags

NGSS.HS-PS1-4

If the energy of the reactants is lower than the energy of the products, what type of reaction is it?

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Grinding a tablet into powder increases the rate of reaction due to increased:

• concentration

• surface area

• temperature

• reactants

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

Why does a higher temperature increase the rate of a reaction?

• it increases both the frequency and energy of particle collisions

• it only increases the frequency of particle collisions

• it only increases the energy of particle collisions

• it reduces the activation energy of the reaction

Tags

NGSS.HS-PS1-5

Why does a higher concentration increase the rate of reaction?

• it increases the amount of reactants

• it lowers the activation energy

• it increases the energy of particle collisions

• it increases the frequency of particle collisions

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.

Tags

NGSS.HS-PS1-5

In a chemical reaction, how quickly or slowly reactants turn

into products is called the

• Catalyst

• Reaction Rate

• Concentration

• Temperature

Tags

NGSS.HS-PS1-5

A ______________ increases the rate of reaction by providing an alternative reaction pathway with a lower activation energy.

• catalyst

• product

• reactant

• solute

If the reactant particles collide with less energy than the activation energy, no reaction will occur.

• True

• False