Reaction Rates and Equilibrium - Test Test

Question 1

What does cap d represent?

Revolt · Accepted Answer

C: energy of the products

Question 2

Which letter represents the activated complex?

Revolt · Accepted Answer

D: cap b

Question 3

Which will not appear in the equilibrium constant expression for the reaction below? cap h sub 2 cap o g plus cap c times s long left right arrow cap h sub 2 of g plus CO times g

Revolt · Accepted Answer

A: cap c

Question 4

Which statement best applies collision theory to preventing a dangerous reaction from occurring?

Revolt · Accepted Answer

C: Keep the reactants in separate containers.

Question 5

Consider the reaction. 2 SO sub 2 g plus cap o sub 2 times g long left right arrow 2 SO sub 3 g When does the given chemical system reach dynamic equilibrium?

Revolt · Accepted Answer

A: when the rates of the forward and reverse reactions are equal

Question 6

Consider the equation below. CaCO sub 3 times s long left right arrow CaO times s plus CO sub 2 times g What is the equilibrium constant expression for the given reaction?

Revolt · Accepted Answer

C: cap k sub e q is equal to open bracket CO sub 2 close bracket

Question 7

Combustion of gasoline in automobiles produces poisonous gases. Catalytic converters that contain solid platinum, palladium, and rhodium change these poisonous gases into harmless gases. Which statement describes the catalyst?

Revolt · Accepted Answer

C: It provides an alternative pathway for the reaction.

Question 8

According to Le Chatelier’s principle, what happens when the concentration of reactants is doubled in a chemical reaction that was in equilibrium?

Revolt · Accepted Answer

C: The equilibrium shifts to the right to favor the formation of products.

Question 9

A student decides to use the rate law when investigating the reaction between sodium bicarbonate and vinegar. NaHCO sub 3 times s plus CH sub 3 COOH A q rightarrow Na raised to the plus A q power plus CH sub 3 COO raised to the negative A q power plus cap h sub 2 cap o l plus CO sub 2 times g Why would a student use rate laws in this investigation?

Revolt · Accepted Answer

A: to see how concentrations of  NaHCO sub 3  and  CH sub 3 COOH  affect reaction rate

Question 10

Consider this equation in chemical equilibrium. cap c sub 2 cap h sub 4 g plus cap h sub 2 of g if and only if cap c sub 2 cap h sub 6 g plus 137 kJ What happens to the amount of ethane open paren cap c sub 2 cap h sub 6 close paren when the temperature of the system is increased?

Revolt · Accepted Answer

B: The amount of ethane decreases.

Reaction Rates and Equilibrium - Test Test Answers

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