Homework #45: LT 1-10

A chemical reaction is most likely to occur when the colliding particles have the proper

• 
  energy and orientation

• solubility and density

• 
  ionic radii and mass

• 
  atomic radii and volume

Tags

NGSS.HS-PS1-5

A chemical reaction is most likely to occur when the colliding particles have the proper (Choose two)

• 
  energy

• density

• orientation

• 
  volume

As the temperature of a chemical reaction in the gas phase is increased, the rate of the reaction increases because

• 
  fewer particle collisions occur

• more effective particle collisions occur

• 
  the required activation energy increases

• 
  the concentration of the reactants increases

Tags

NGSS.HS-PS1-5

Given the reaction:

A(s) + B(aq) -->C(aq) + D(s)

Which change would increase the rate of this reaction? (Choose two)

• increase concentration of A or B

• increase temperature

• decrease concentration of A or B

• decrease temperature

Tags

NGSS.HS-PS1-5

In a chemical reaction, a catalyst provides an alternate reaction pathway that

• 
  decreases the concentration of the products

• increases the concentration of the reactants

• 
  has a lower activation energy

• 
  has a higher activation energy

Which intervals are affected by the addition of a catalyst? ( Choose two)

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

What is the energy of reactants?

• 1

• 2

• 3

• 4

• not listed

Tags

NGSS.HS-PS1-4

What is the activation energy of the forward reaction?

• 1

• 2

• 3

• 4

• not listed

Tags

NGSS.HS-PS1-4

What is the heat of reaction?

• 1

• 2

• 3

• 4

• not listed

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

NGSS.HS-PS3-1

The melting of an ice cube is an example of (Choose two)

• an endothermic reaction making the water colder

• an exothermic reaction making the water hotter

• physical change

• chemical change

Tags

NGSS.HS-PS3-4