Potential Energy Diagrams

What factors are required for a chemical reaction to occur?

• collision of reactant particles
• sufficient energy 
• favorable orientation of particles
• all of these

Tags

NGSS.HS-PS1-4

The rate of a chemical reaction increases as temperature__________________.

• Decreases
• Increases
• Stays the Same

Tags

NGSS.HS-PS1-5

In a chemical reaction, 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

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

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

• larger
• smaller

Tags

NGSS.HS-PS1-5

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

• false
• true

Tags

NGSS.HS-PS1-5

Exothermic reactions release heat energy to the surroundings.

• true
• false

Tags

NGSS.HS-PS1-4

A catalyst increases the efficiency of collisions between reactants.

• true
• false

Tags

NGSS.HS-PS1-5

The rate of a chemical reaction means

• amount of product formed
• speed of reaction
• concentration of reacting particles
• combining reactants with products

Tags

NGSS.HS-PS1-5

Activation energy is required to start a chemical reaction. What is activation energy?

• The maximum amount of energy used
• The minimum amount of energy required form the activated complex
• The energy of the reactants
• The energy possessed by the products

Tags

NGSS.HS-PS1-4