Final Exam Review_General Chemistry II

Which one of the following is a first order, overall reaction

• k₁= 1.000 M s^-1
• k₁= 5403.2 M^½ s^½
• k₁= 1.23 x 10^-6 M^-1 s^-1
• k₁= 10.7 s^-1

Tags

NGSS.HS-PS1-5

Which of the following statements is correct for the graphs given here?

• A. is most exothermic
• B. is most exothermic
• C. is most exothermic
• D. is most exothermic

Tags

NGSS.HS-PS1-4

step 1: O₃ → O₂ + O
step 2: O₃ + O → 2 O₂

The oxygen atom (O) is considered to be a(n)...

• reactant
• catalyst
• reaction intermediate
• activated complex

Multi-step (Consecutive) Reactions:
Mechanisms in which one elementary step is followed by another are very common.
step 1:              A + B → Q
step 2:              B + Q → C
net reaction:    A + 2B → C
Which of the following is false?

• The net reaction is just the sum of its elementary steps.
• The species Q is an intermediate, usually an unstable or highly reactive species. 
• Intermediates such as Q can appear in the rate law of a net reaction.
• If both steps proceed at similar rates, rate law experiments on the net reaction would not reveal that two separate steps are involved here.The rate law for the reaction would berate=k[A][B]2

Tags

NGSS.HS-PS1-5

The rate law for a reaction is rate = k [A][B]² .

Which one of the following statements is false? 

• A) If [B] is doubled, the reaction rate will increase by a factor of 4. 
• B) The reaction is second order in B.
• C) The reaction is first order in A.
• D) The reaction is second order overall.

Tags

NGSS.HS-PS1-5

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

Tags

NGSS.HS-PS2-3

The catalyst alters the rate of a chemical reaction by,

• providing an alternative pathway with a lower E_a

• 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

What would the rate constant of the reaction be given the following set of experiments?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-5

What states that when an equilibrium is stressed, it will proceed in the direction that will relieve the stress?

• Rate law

• Equilibrium Constant

• Le Chatelier's principle

• Constant law

Tags

NGSS.HS-PS1-6

If a reaction has the same number of gas particles in the reactants and in the products, how will increasing pressure affect the reaction?

• it will become product favored

• it will become reactant favored

• it will have no effect