AP Kinetics

At higher temperature, 2000K, the curve is shifted to the right. Which of the following is true?

• fraction of molecules with energy > E_a increases
• fraction of molecules with energy > E_a decreases
• more particles under the curve
• less particles under the curve

Which of the following best explains how a catalyst increases the rate of reaction?

• a catalyst provides an alternative pathway of lower activation energy

• a catalyst provides an alternative pathway of higher activation energy

• a catalyst provides an alternative pathway of lower activation energy for the forward reaction only

• a catalyst provides an alternative pathway of lower activation energy for the back reaction only

Which numbered interval on the diagram would change when a catalyst is added?

• B & C
• C & D 
• E & C
• A & D 

If the temperature is reduced, a reaction rate will ______

• increase

• decrease

• stay the same

Tags

NGSS.HS-PS1-5

If the concentration of a reactant is increased, the reaction rate will ___________.

• increase

• decrease

• stay the same

Tags

NGSS.HS-PS1-5

Which of these will NOT speed up the rate of reaction between a strip of magnesium and hydrochloric acid?

• tightly coil up the strip of magnesium
• cut up the strip of magnesium
• increase the concentration of the hydrocholoric acid
• increase the temperature of the hydrocholoric acid

Grinding a seltzer tablet into powder increases the rate of reaction due to...

• increased concentration of reactants
• increased surface area
• increased speed of particles.
• better orientation of reactants

Tags

NGSS.HS-PS1-5

Which of the following is FALSE for Maxwell Boltzmann distribution curve?

• Area under curve represent number of particles
• Increase in temperature will shift the curve to right
• High temp, fraction of molecules with energy > E_a increases
• At higher temp, area under curve is greater than at low temp

If my rate law is second order and I increase my concentration to 4, what would my new rate be? 

• 4
• 16
• 2
• 8

What would be my the overall order of this rate law? 
Rate=[A]²[B]¹

• 0 Order
• 1st Order
• 2nd Order
• 3rd Order