Intro Kinetics

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 

Under the collision theory, the 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 is NOT a factor affecting reaction rate?

• temperature
• catalysts
• particle size
• polarity

Which group of particles shows that increasing surface area increases collisions among particles?

• Left side

• Right side

• Cannot be determined by either picture

Decreasing the particle size increases the reaction rate because

• It makes particles move faster
• It increases the likelihood of collisions with the correct geometry
• It decreases the surface area available to react
• It increases the number of collisions

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.

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

Decreasing the particle size increases the reaction rate because

• It makes particles move faster

• It increases the likelihood of collisions with the correct geometry

• It decreases the surface area available to react

• It increases the surface area of the reactants thus more particles collides with each other therefore increase the frequency of effective collisions

Adding a catalyst to a chemical reaction changes the rate of reaction by causing

• a decrease in the activation energy
• an increase in the activation energy
• a decrease in the heat of reaction
• an increase in the heat of reaction

Which interval represents the activation energy of the forward reaction?

• A
• B
• C
• E