Question 1

Biological catalysts held together in a very specific three-dimensional shape are called ________.

Accepted Answer

The answer of Biological catalysts held together in a very...

Question 2

Which of the following will increase the rate of a reaction?

Accepted Answer

A) Increasing the temperature 
B) Increasing the concentration of a reactant 
C) Adding a catalyst 
D) Ensuring that the reactants are properly aligned when they collide 
E) All of these changes will increase the rate of a reaction. 
A) Increasing the temperature 
B) Increasing the concentration of a reactant 
C) Adding a catalyst 
D) Ensuring that the reactants are properly aligned when they collide 
E) All of these changes will increase the rate of a reaction.

Question 3

When heat is added to an exothermic equilibrium reaction,the reaction shifts to form more ________.

Accepted Answer

The answer of When heat is added to an exothermic...

Question 4

Consider the reaction: 2 C2H6(g)+ 7 O2(g)→ 4 CO2(g)+ 6 H2O(g). Increasing the concentration of C2H6(g)will decrease the activation energy.

Accepted Answer

A) True 
 B)False

Question 5

Consider the reaction: N2(g)+ O2(g)   2 NO(g). If [N2] = 0.520 M,[O2] = 0.0662 M,and [NO] = 0.00956 at equilibrium,what is the value of K?

Accepted Answer

A) 3.60 
B) 0.278 
C) 377 
D) 0.00265 
A) 3.60 
B) 0.278 
C) 377 
D) 0.00265

Question 6

The enzyme lactase aids in the digestion of ________.

Accepted Answer

The answer of The enzyme lactase aids in the digestion...

Question 7

What is the expression for the equilibrium constant for the reaction: 2 C2H6(g)+ 7 O2(g)   4 CO2(g)+ 6 H2O(g)?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 8

The difference in energy between the reactants and the transition state is called the energy of activation,symbolized by Ea.

Accepted Answer

A) True 
 B)False

Question 9

A manufacturing company requires 157 kJ of energy to power one of its machines for a day. The reaction shown below would be able to provide a sufficient amount of energy for this purpose.
2 HgO(s)→ 2 Hg(l)+ O2(g)ΔH = 182 kJ

Accepted Answer

A) True 
 B)False

Question 10

The hydrolysis of sucrose depicted below has K = 1.4 × 105. Which of the following is a reasonable assumption about this reaction once equilibrium is established? sucrose + H2O   glucose + fructose

Accepted Answer

A) The equilibrium mixture contains equal amounts of sucrose,glucose,and fructose. 
B) The equilibrium mixture contains mostly glucose and fructose. 
C) The equilibrium mixture contains mostly sucrose. 
D) The equilibrium shifts to the left due to the high value for K. 
A) The equilibrium mixture contains equal amounts of sucrose,glucose,and fructose. 
B) The equilibrium mixture contains mostly glucose and fructose. 
C) The equilibrium mixture contains mostly sucrose. 
D) The equilibrium shifts to the left due to the high value for K.

Question 11

The energy of the reacting molecules affects whether a particular collision will lead to a chemical reaction.

Accepted Answer

A) True 
 B)False

Question 12

Consider the reaction: 2 C2H6(g)+ 7 O2(g)→ 4 CO2(g)+ 6 H2O(g). Decreasing the concentration of C2H6(g)will decrease the reaction rate.

Accepted Answer

A) True 
 B)False

Question 13

Which value (if any)in each pair corresponds to a slower reaction?

Accepted Answer

A) Ea = 1 kcal 
B) Ea = 10 kcal 
C) Ea = 100 kcal 
D) Reaction rate is independent of Ea value. 
A) Ea = 1 kcal 
B) Ea = 10 kcal 
C) Ea = 100 kcal 
D) Reaction rate is independent of Ea value.

Question 14

Consider the following reversible reaction at equilibrium: 2 NO(g)+ O2(g)   2 NO2(g). If the pressure inside the reaction vessel is increased,the equilibrium will shift to the right.

Accepted Answer

A) True 
 B)False

Question 15

A catalytic converter uses a catalyst to catalyze three reactions that clean up the exhaust from an auto engine. Which element is not used as a catalyst in catalytic converters?

Accepted Answer

A) Platinum 
B) Rhodium 
C) Sulfur 
D) Palladium 
A) Platinum 
B) Rhodium 
C) Sulfur 
D) Palladium

Question 16

In the energy diagram shown below,C labels the ________.

Accepted Answer

The answer of In the energy diagram shown below,C labels...

Question 17

Ammonia (NH3)is synthesized by the reaction of nitrogen and hydrogen in the presence of an iron catalyst according to the equation below. Removing the iron catalyst would decrease the reaction rate.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following energy quantities is equivalent to 258 Cal?

Accepted Answer

A) 258 cal 
B) 1080 J 
C) 1080 kJ 
D) 6.17 × 104 kJ 
A) 258 cal 
B) 1080 J 
C) 1080 kJ 
D) 6.17 × 104 kJ

Question 19

An equilibrium constant with a value of 1.5 × 10-9 indicates that at equilibrium ________.

Accepted Answer

A) the reactants are favored 
B) the products are favored 
C) approximately equal concentrations of reactants and products are present 
D) there are more products present than reactants 
A) the reactants are favored 
B) the products are favored 
C) approximately equal concentrations of reactants and products are present 
D) there are more products present than reactants

Question 20

Consider the reversible reaction: CO(g)+ Cl2(g)   COCl2(g). The reverse reaction is COCl2(g)→ CO(g)+ Cl2(g).

Accepted Answer

A) True 
 B)False

Exam 6: Energy Changes,reaction Rates,and Equilibrium

Biological catalysts held together in a very specific three-dimensional shape are called ________.

Which of the following will increase the rate of a reaction?

When heat is added to an exothermic equilibrium reaction,the reaction shifts to form more ________.

Consider the reaction: 2 C2H6(g)+ 7 O2(g)→ 4 CO2(g)+ 6 H2O(g). Increasing the concentration of C2H6(g)will decrease the activation energy.

Consider the reaction: N2(g)+ O2(g) 2 NO(g). If [N2] = 0.520 M,[O2] = 0.0662 M,and [NO] = 0.00956 at equilibrium,what is the value of K?

The enzyme lactase aids in the digestion of ________.

What is the expression for the equilibrium constant for the reaction: 2 C2H6(g)+ 7 O2(g) 4 CO2(g)+ 6 H2O(g)?

The difference in energy between the reactants and the transition state is called the energy of activation,symbolized by Ea.

A manufacturing company requires 157 kJ of energy to power one of its machines for a day. The reaction shown below would be able to provide a sufficient amount of energy for this purpose. 2 HgO(s)→ 2 Hg(l)+ O2(g)ΔH = 182 kJ

The hydrolysis of sucrose depicted below has K = 1.4 × 105. Which of the following is a reasonable assumption about this reaction once equilibrium is established? sucrose + H2O glucose + fructose

The energy of the reacting molecules affects whether a particular collision will lead to a chemical reaction.

Consider the reaction: 2 C2H6(g)+ 7 O2(g)→ 4 CO2(g)+ 6 H2O(g). Decreasing the concentration of C2H6(g)will decrease the reaction rate.

Which value (if any)in each pair corresponds to a slower reaction?

Consider the following reversible reaction at equilibrium: 2 NO(g)+ O2(g) 2 NO2(g). If the pressure inside the reaction vessel is increased,the equilibrium will shift to the right.

A catalytic converter uses a catalyst to catalyze three reactions that clean up the exhaust from an auto engine. Which element is not used as a catalyst in catalytic converters?

In the energy diagram shown below,C labels the ________.

Ammonia (NH3)is synthesized by the reaction of nitrogen and hydrogen in the presence of an iron catalyst according to the equation below. Removing the iron catalyst would decrease the reaction rate.

Which of the following energy quantities is equivalent to 258 Cal?

An equilibrium constant with a value of 1.5 × 10-9 indicates that at equilibrium ________.

Consider the reversible reaction: CO(g)+ Cl2(g) COCl2(g). The reverse reaction is COCl2(g)→ CO(g)+ Cl2(g).

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Gases,liquids,and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen,halogen,or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids,esters,and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids,proteins,and Enzymes

Nucleic Acids and Protein Synthesis

Metabolism and Energy Production

Carbohydrate,lipid,and Protein Metabolism

Filters

Consider the reaction: 2 C₂H₆(g)+ 7 O₂(g)→ 4 CO₂(g)+ 6 H₂O(g). Increasing the concentration of C₂H₆(g)will decrease the activation energy.

Consider the reaction: N₂(g)+ O₂(g) 2 NO(g). If [N₂] = 0.520 M,[O₂] = 0.0662 M,and [NO] = 0.00956 at equilibrium,what is the value of K?

What is the expression for the equilibrium constant for the reaction: 2 C₂H₆(g)+ 7 O₂(g) 4 CO₂(g)+ 6 H₂O(g)?

The difference in energy between the reactants and the transition state is called the energy of activation,symbolized by E_a.

A manufacturing company requires 157 kJ of energy to power one of its machines for a day. The reaction shown below would be able to provide a sufficient amount of energy for this purpose. 2 HgO(s)→ 2 Hg(l)+ O₂(g)ΔH = 182 kJ

The hydrolysis of sucrose depicted below has K = 1.4 × 10⁵. Which of the following is a reasonable assumption about this reaction once equilibrium is established? sucrose + H₂O glucose + fructose

Consider the reaction: 2 C₂H₆(g)+ 7 O₂(g)→ 4 CO₂(g)+ 6 H₂O(g). Decreasing the concentration of C₂H₆(g)will decrease the reaction rate.

Consider the following reversible reaction at equilibrium: 2 NO(g)+ O₂(g) 2 NO₂(g). If the pressure inside the reaction vessel is increased,the equilibrium will shift to the right.

Ammonia (NH₃)is synthesized by the reaction of nitrogen and hydrogen in the presence of an iron catalyst according to the equation below. Removing the iron catalyst would decrease the reaction rate.

An equilibrium constant with a value of 1.5 × 10^-9 indicates that at equilibrium ________.

Consider the reversible reaction: CO(g)+ Cl₂(g) COCl₂(g). The reverse reaction is COCl₂(g)→ CO(g)+ Cl₂(g).