FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 9: Reaction Rates and Chemical Equilibrium

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 31

Multiple Choice

Review LaterAdd Note

Review Later

In the following gas phase reaction, what is the effect on the direction of the reaction if more SO₃ is added to the reaction mixture? 2SO₂(g) + O₂(g) ⇌ 2SO₃(g)

A) The equilibrium shifts to produce more products.
B) The position of the equilibrium remains unchanged.
C) The rate of formation of products is increased.
D) The equilibrium shifts to produce more reactants.
E) The catalyst for the reaction is used up.

Correct Answer

verified

Show Answer

Question 32

Multiple Choice

Review LaterAdd Note

Review Later

For the following reaction, the equilibrium constant Kc is 2.0 at a certain temperature. Write the equilibrium constant expression of the equilibrium constant, Kc. 2NOBr(g) ? 2NO(g) + Br?(g)

A) $\frac { \left[ \mathrm { Br } ^ { 2 } \right] [ \mathrm { NO } ] ^ { 2 } } { [ \mathrm { NOBr } ] ^ { 2 } }$
B) $\frac { \left[ \mathrm { Br } _ { 2 } \right] [ \mathrm { NO } ] } { [ \mathrm { NOBr } ] ^ { 2 } }$
C) $\frac { \left[ \mathrm { Br } _ { 2 } \right] [ \mathrm { NO } ] ^ { 2 } } { [ \mathrm { NOBr } ] }$
D) $\frac { \left[ \mathrm { Br } ^ { 2 } 2 \right] [ \mathrm { NO } ] } { [ \mathrm { NOBr } ] }$
E) $\frac { [ \mathrm { Br } ] [ \mathrm { NO } ] } { [ \mathrm { NOBr } ] }$

Correct Answer

verified

Show Answer

Question 33

Multiple Choice

Review LaterAdd Note

Refrigerating perishable foods affects biochemical reactions by

An equilibrium constant greater than 1 for a reaction indicates that the reaction favors formation of the products.

Write the equilibrium constant expression for the reaction of nitrogen and hydrogen to give ammonia, NH₃.

In the reaction of carbon dioxide with water to give carbonic acid, the only gaseous component is the carbon dioxide. What will happen to the equilibrium concentration of carbonic acid if the pressure of carbon dioxide is increased in the container?

Indicate the effect of each change upon the rate of a reaction. -removing some reactant

Any reaction that absorbs 150 kcal of energy can be classified as __________.

Which of the following equilibrium constants indicates the reaction that gives the smallest amount of product?

In the reaction of nitrogen gas with oxygen gas to produce nitrogen oxide, what is the effect of adding more oxygen gas to the initial reaction mixture? The reaction is shown below. N₂(g) + O₂(g) ⇌ 2NO(g)

The __________ is the energy difference between reactants and products in a chemical reaction.

Indicate the effect of each change upon the rate of a reaction. -The concentration of a reactant is decreased.

An equilibrium constant Kc = 1 × 10⁷ for a reaction indicates that the reaction favors product formation.

Iron metal reacts with oxygen gas to produce iron(III) oxide. What will be the effect of increasing the pressure of oxygen gas in a closed reaction vessel?

For the following equilibrium reaction, which cause and effect are correctly matched? CO(g) + 2H₂(g) ⇌ CH₃OH(g) + heat

The reaction for the decomposition of PCl₅ to chlorine and PCl₃ is shown below. PCl₅(g) ⇌ PCl₃(g) + Cl₂(g) If the equilibrium concentrations are [PCl₅] = 1.0 M, [PCl₃] = 0.10 M, [Cl₂] = 0.10 M, what is the value of the equilibrium constant?

Indicate the effect of each change upon the rate of a reaction. -adding a catalyst

For the reaction of carbon with carbon dioxide to make carbon monoxide, the reaction is as follows. C(s) + CO₂(g) ⇌ 2CO(g) This is an example of a __________ equilibrium.

A catalyst for a chemical reaction affects the magnitude of the equilibrium constant.

An equilibrium constant with a value greater than 1 means the reaction favors the __________.