Kinetics Chemistry

Which graph is obtained from a first order reaction?B

• A

• B

• C

• D

Tags

NGSS.HS-PS1-5

Which is correct for the reaction mechanism shown?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-5

Which statement is correct about a catalyst?

• It decreases the activation energy of the forward reaction but not the reverse.

• It increases the proportion of products to reactants in an equilibrium.

• It decreases the enthalpy change of the reaction.

• It changes the mechanism of the reaction.

Tags

NGSS.HS-PS1-4

What is the order with respect to each reactant?

• Order with respect to NO = 0; Order with respect to Cl2 = 1

• Order with respect to NO = 1; Order with respect to Cl2 = 1

• Order with respect to NO = 2; Order with respect to Cl2 = 1

• Order with respect to NO = 2; Order with respect to Cl2 = 2

Tags

NGSS.HS-PS1-5

Compounds X and Y were mixed and the time taken for a colour to appear was recorded at various reactant concentrations. What are the orders of reaction with respect to X and Y?

• X = 1; Y = 2

• X = 1/2; Y = 1/4

• X = 2; Y = 1

• X = 2; Y = 4

Tags

NGSS.HS-PS1-5

The rate expression for the reaction is: rate = k [NO]²[O₂].

2NO (g) + O₂ (g) → 2NO₂ (g)

Which mechanism is not consistent with this rate expression?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-5

The reaction between NO₂ and F₂ gives the following rate data at a certain temperature.

• 3

• 2

• 1

• 0

Tags

NGSS.HS-PS1-5

When X reacts with Y to give Z, the following graph is plotted. What can be deduced from the graph?

• The concentration of X is directly proportional to time.

• The reaction is first order overall.

• The reaction is zero order with respect to X.

• The reaction is first order with respect to X.

Tags

NGSS.HS-PS1-5

Which statement is correct?

• The value of the rate constant, k, is independent of temperature and is deduced from the equilibrium constant, K_c.

• The value of the rate constant, k, is independent of temperature and the overall reaction order determines its units.

• The value of the rate constant, k, is temperature dependent and is deduced from the equilibrium constant, K_c.

• The value of the rate constant, k, is temperature dependent and the overall reaction order determines its units.

Tags

NGSS.HS-PS1-5

The rate expression for the reaction X (g) + 2Y (g) → 3Z (g) is

rate = k[X]⁰ [Y]²

By which factor will the rate of reaction increase when the concentrations of X and Y are both increased by a factor of 3?

• 6

• 9

• 18

• 27

Tags

NGSS.HS-PS1-5