CPC U11 Target 1

If the reactant particles collide with less than the activation energy, the particles will be rebound, and no reaction will occur.

• True
• False

Tags

NGSS.HS-PS1-5

With the increase in temperature, the average kinetic energy of the molecules increases, leading to a decrease in number of collisions per unit time.

• True
• False

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-2

More collisions correspond to a: 

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

Tags

NGSS.HS-PS1-5

Which of the following is/are the fundamental idea(s) of collision theory?

• Molecules react by colliding together
• The effective collisions must occur with certain minimum amounts of energy 
• In a large sample, the greater the number of effective collisions, and the faster the rate of reaction
• All of the above

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 ____ 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

As a reaction proceeds, the concentration of reactants will _______ and the concentration of products will ________.

• increase, decrease

• increase, increase

• decrease, decrease

• decrease, increase

Tags

NGSS.HS-PS1-5

How can you increase the rate of a reaction

• Decrease the pressure
• Increase the rate of collisions
• Decrease the concentration
• Increase the concentration

Tags

NGSS.HS-PS1-5

List four factors that affects the rate of a reaction

• temperature

• concentration

• surface area

• volume

• catalysts

Tags

NGSS.HS-PS1-5

A temperature increase causes the particles ......

• to slow down

• move faster

• collide higher

• in the right order

Tags

NGSS.HS-PS1-5