Chemical Kinetics

Which of the following is NOT a factor affecting reaction rate?

• temperature
• catalysts
• particle size
• polarity

Tags

NGSS.HS-PS1-5

Reaction rate means...

• amount of product formed
• speed of reaction
• concentration of reacting particles
• combining reactants with products

Tags

NGSS.HS-PS1-5

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

Tags

NGSS.HS-PS1-5

A possible rate law for a third overall order of a reaction is __________________

• Rate = k [A]²[B]²
• Rate = k [A][B]³
• Rate = k [A]³ [B]
• Rate = k [A]²[B]

Tags

NGSS.HS-PS1-5

Given the following rate law,

rate = k[A]²[B]

if [A] were doubled, what must happen to [B] to keep the rate constant?

• [B] must quadruple

• [B] must double

• [B] must be havled

• [B] must be quartered

Tags

NGSS.HS-PS1-5

The catalyst alters the rate of a chemical reaction by,

• providing an alternative pathway with a lower Ea

• changing the products formed in the direction of the reaction

• providing a surface on which the molecules react

• increasing the frequencies of collisions between molecules

Which of the following are true of reaction rates?

I. The overall rate law is determined by the fastest step of a reaction

II. The presence of a catalyst will increase the number of molecules entering the transition state

III. An increase in temperature will increase the rate of a reaction

IV. Increasing the concentration of reactants will increase the rate at which products yield

• II+III+IV

• I+IV

• II + III

• I+II+III

Tags

NGSS.HS-PS1-5

Units of rate is _______-

• M/s

• mol/s

• m.s

• s/M

A reaction is found to be second order with respect to carbon monoxide. If the concentration of carbon monoxide is doubled, the rate of reaction __________.

• doubles

• remains unchanged

• increases by a factor of 4

• is reduced by a factor of 2

Tags

NGSS.HS-PS1-5

What letter represents the activation energy?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4