Kinetics practice

More collisions correspond to a: 

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

Tags

NGSS.HS-PS1-5

What two factors govern whether a collision between reacting particles will be effective?

• orientation and potential energy 
• kinetic energy and temperature 
• kinetic energy and orientation 
• potential energy and kinetic energy 

The rate of a chemical reaction is NOT affected by which of the following:

• temperature
• concentration
• particle size (surface area)
• All of these affect reaction rates

Tags

NGSS.HS-PS1-5

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

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

Why does a higher temperature increase the rate of a reaction?

• it increases both the frequency and energy of particle collisions
• it only increases the frequency of particle collisions
• it only increases the energy of particle collisions
• it reduces the activation energy of the reaction

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

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

• larger
• smaller

Usually lowering the temperature will slow down a reaction.

• false
• true

Tags

NGSS.HS-PS1-5

A catalyst works by

• changing the order of the reaction

• increasing the temperature

• lowering the activation energy

• making the activated complex