Kinetics

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

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

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

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

The following data were measured for the reaction

BF₃(g) + NH_3(g) ⟶ F₃BNH_3(g)

What is the rate law for the reaction?

• rate = k[NH₃]

• rate = k[BF₃]²[NH₃]

• rate = k[BF₃][NH₃]

• rate = k[BF₃][NH₃]²

Tags

NGSS.HS-PS1-5

What letter represents the activation energy of the forward reaction?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

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

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

Given the following balanced equation :

2NO(g) + Cl₂(g) → 2NOCl(g)

If the rate of disappearance of Cl₂ is 4.84 x 10^-2 Ms^-1, what is the rate of disappearance of NO?

• 1.45 x 10^-2 Ms^-1

• 2.42 x 10^-2 Ms^-1

• 3.67 x 10^-2 Ms^-1

• 9.68 x 10^-2 Ms^-1

Tags

NGSS.HS-PS1-7

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

Tags

NGSS.HS-PS1-4