Kinetics and Equilibrium Practice

Copper catalyses the reaction between zinc and dilute sulfuric acid.

Zn(s) + H₂SO₄(aq) → ZnSO₄(aq) + H₂(g)

Why does copper affect the reaction?

• Decreases the activation energy

• Increases the activation energy

• Increases the enthalpy of reaction

• Decreases the enthalpy of reaction

Tags

NGSS.HS-PS1-4

According to collision theory, particles must collide with ____ and ____ for a reaction to occur.

• sufficient rate and sufficient energy

• sufficient surface area and correct orientation

• sufficient catalyst and sufficient energy

• sufficent energy and correct orientation

More collisions correspond to a:

• faster reaction rate

• slower reaction rate

• unchanged reaction rate

Tags

NGSS.HS-PS1-5

Which of the following would lead to a slower reaction rate?

• Place the reactants in hot water

• Place the products in an ice bath

• Place the reactants in an ice bath

• Stirring the reactants with a stirring rod

Tags

NGSS.HS-PS1-5

What type of reaction is this?

• Endothermic
• Exothermic

Tags

NGSS.HS-PS1-4

What are the two factors to look for when determining if the reaction is at equilibrium?

• Forward reaction rate is faster than the reverse and concentrations are equal
• Forward and reverse reaction rates are equal and concentration is conctant
• Forward and revers reaction rates are equal and concentration is equal
• Forward reaction rate is faster than the reverse and concentration is equal

Tags

NGSS.HS-PS1-6

This symbol indicates that a reaction is ____________

• reversible
• irreversible

Tags

NGSS.HS-PS1-6

How do catalysts increase the rate of reaction?

• The frequency of collisions is the increased
• the activation energy is lowered
• the energy of collisions is increased
• Both the frequency and energy of collisions is increased

Tags

NGSS.HS-PS1-5

What is the activation energy?

• the quantity of heat absorbed in a reaction
• the minimum energy needed to begin a reaction
• the energy given off after reactants collide.
• both the energy and frequeny of collisions in increased
  the energy difference between reactants and products

Tags

NGSS.HS-PS1-4

For the reaction...
SO₂ + O₂ ↔ SO₃
If the equilibrium shifts to the right, the concentration of O₂ will ___________.

• increase
• decrease
• remain the same
• double

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6