Kinetics Quiz Practice

Which of the following are needed for a reaction to occur?

• Particles need to collide.

• Particles need to be orientated correctly.

• Particles need a minimum amount of energy to make/break bonds.

• Particles can only interact with themselves.

Given reactions A & B (assuming the particles are colliding and orientated correctly) which reaction will occur at a faster rate and why?

• A. At lower temperatures more energy is conserved and not lost to moving around.

• A. Particles have less heat/energy and will less likely miss a collision.

• B. Particles are reacting in a smaller volume with a higher chance of collision.

• B. Particles have more heat/energy to make/break bonds.

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NGSS.HS-PS1-5

(a)   reactions (pictured) have ​ (b)   sitting at a higher potential energy ​ (c)   energy as they form ​ (d)   at a lower energy level.

• Exothermic
• Endothermic
• reactants
• products
• releasing
• absorbing

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NGSS.HS-PS1-4

(a)   reactions (pictured) have ​ (b)   sitting at a lower potential energy ​ (c)   energy as they form ​ (d)   at a lower higher energy level.

• Endothermic
• Exothermic
• reactants
• products
• releasing
• absorbing

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NGSS.HS-PS1-4

Match the following terms and definitions for factors taht affect the rates of reactions.

• Mixing

• Increases the kinetic energy and increases chances of collision.

• Concentration

• Affects the amount of thermal energy in the reaction.

• Catalyst

• Changes the amount of substance in the reaction.

• Pressure

• Lowers activation energy and not consumed in the reaction.

• Temperature

• Changes the energy of gas particles in a reaction

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NGSS.HS-PS1-5

Match the following examples of factors that affect the rate of a reaction.

• Catalyst

• Adding more of a reactant

• Mixing

• Ice bath

• Temperature

• Adding an acid (H2SO4)

• Concentration

• Stirring

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NGSS.HS-PS1-5

Based on this reaction curve, which reaction would indicate the presence of an addition of a catalyst and why?

• A. It has a higher Ea.

• A. It has has a higher temperature.

• B. It has a lower Ea than the other curve.

• B. It reacts faster than reaction A.

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NGSS.HS-PS1-5

NGSS.HS-PS1-4

Which of the following increase the reaction rate?

• less surface area
• lower temperature
• an inhibitor
• increased concentration

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NGSS.HS-PS1-5

More collisions correspond to a: 

• Faster reaction rate  
• Slower reaction rate
• Constant reaction rate 
• None of the above

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NGSS.HS-PS1-5

What is activation energy?

• The maximum amount of energy used

• The minimum amount of energy required for a reaction to start

• The energy of the reactants

• The energy possessed by the products

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NGSS.HS-PS1-5

NGSS.HS-PS1-4