Speeding Up Chemical Reactions: Key Factors Explained

The video explains chemical reactions, where substances transform into new ones, and introduces key concepts like reactants, products, collision theory, and activation energy. It outlines five methods to speed up reactions: increasing temperature, concentration, surface area, adding catalysts, and increasing pressure. Each method is explained with examples, emphasizing how they enhance the likelihood of successful particle collisions, thus accelerating reaction rates.

What are the substances called that are transformed into new substances during a chemical reaction?

• Inhibitors

• Catalysts

• Reactants

• Products

Tags

NGSS.HS-PS1-7

What must occur for a chemical reaction to take place according to collision theory?

• Particles must be at a high temperature

• Particles must be in a gaseous state

• Particles must collide with enough energy

• Particles must be in a liquid state

Tags

NGSS.HS-PS1-5

What is the term for the minimum energy required for a reaction to occur?

• Activation energy

• Potential energy

• Kinetic energy

• Thermal energy

How does increasing the temperature affect the rate of a chemical reaction?

• It decreases the kinetic energy of particles

• It increases the kinetic energy of particles

• It decreases the concentration of reactants

• It increases the surface area of reactants

Tags

NGSS.HS-PS1-5

What happens when the concentration of reactants is increased?

• The reactants turn into catalysts

• The rate of reaction increases

• The rate of reaction remains the same

• The rate of reaction decreases

Tags

NGSS.HS-PS1-5

Why does crushing solid reactants increase the rate of reaction?

• It increases the surface area

• It decreases the temperature

• It decreases the concentration

• It increases the pressure

What is the role of a catalyst in a chemical reaction?

• It decreases the surface area

• It increases the activation energy

• It decreases the activation energy

• It gets consumed in the reaction

How does a catalyst help particles during a reaction?

• By increasing their temperature

• By increasing their size

• By providing another path for the reaction

• By decreasing their concentration

In which type of reactions is increasing pressure an effective way to speed up the reaction?

• Reactions involving liquids

• Reactions involving catalysts

• Reactions involving gases

• Reactions involving solids

Tags

NGSS.HS-PS1-5

What is the effect of increasing pressure on gas particles in a reaction vessel?

• It increases the volume and decreases collision frequency

• It decreases the volume and increases collision frequency

• It increases the temperature and decreases collision frequency

• It decreases the temperature and increases collision frequency