Question 1

What would be the effect of doubling the pressure on the following equilibrium system?
N2(g)+ 3F2(g)  
2NF3(g)

Accepted Answer

A)  Shift it to the right. 
B)  Shift it to the left. 
C)  Will have no effect. 
D)  Will be impossible to predict. 
A)  Shift it to the right. 
B)  Shift it to the left. 
C)  Will have no effect. 
D)  Will be impossible to predict.

Question 2

The only way to increase the rate of a reaction is to increase the concentration of the reactants.

Accepted Answer

A) True 
 B)False

Question 3

A catalyzed,aqueous chemical reaction occurs.Which of the following conditions will reach completion the soonest?

Accepted Answer

A)  a low concentration of catalyst 
B)  a high concentration of the reactants 
C)  a high concentration of catalyst 
D)  stirring the reaction mixture 
A)  a low concentration of catalyst 
B)  a high concentration of the reactants 
C)  a high concentration of catalyst 
D)  stirring the reaction mixture

Question 4

The device used to measure heat produced or used by a chemical reaction is called a(n)_____ .

Accepted Answer

A)  thermometer 
B)  calorimeter 
C)  activator 
D)  joulery 
A)  thermometer 
B)  calorimeter 
C)  activator 
D)  joulery

Question 5

Ice has a(n)____ entropy than that of liquid water.

Accepted Answer

A)  lower 
B)  equal 
C)  higher 
D)  can not tell 
A)  lower 
B)  equal 
C)  higher 
D)  can not tell

Question 6

Increasing the concentration of a reactant will increase the number of effective collisions.

Accepted Answer

A) True 
 B)False

Question 7

A reaction is spontaneous when the conditions are

Accepted Answer

A)  present for that reaction to progress and it does. 
B)  at STP. 
C)  such for an exothermic reaction that there is less energy in the reactants than in the products. 
D)  There is more than one correct response. 
A)  present for that reaction to progress and it does. 
B)  at STP. 
C)  such for an exothermic reaction that there is less energy in the reactants than in the products. 
D)  There is more than one correct response.

Question 8

A patient complains about having painful muscle spasms after working on a very hot day.The patient's skin is moist and cool,heart rate is near normal as well as his/her body temperature.What should you not do for them?

Accepted Answer

A)  get them to a cool place 
B)  give them a caffeinated drink 
C)  sponge them with cool water 
D)  encourage them to lie down and rest 
A)  get them to a cool place 
B)  give them a caffeinated drink 
C)  sponge them with cool water 
D)  encourage them to lie down and rest

Question 9

If the reaction A + B $\rarr$ C is exothermic,the concentration of C should increase with increasing temperature.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is an endergonic process?

Accepted Answer

A)  exothermic reactions 
B)  endothermic reactions 
C)  equilibrium reactions 
D)  none of them 
A)  exothermic reactions 
B)  endothermic reactions 
C)  equilibrium reactions 
D)  none of them

Question 11

Activation energy is the total energy released when a reaction takes place.

Accepted Answer

A) True 
 B)False

Question 12

For the following reaction,which of the given changes will increase the value of the equilibrium constant?
AB + CD  
AD + BC + heat

Accepted Answer

A)  decreasing the temperature 
B)  adding AB to the reaction 
C)  removing CD from the reaction 
D)  All of these changes will increase K. 
A)  decreasing the temperature 
B)  adding AB to the reaction 
C)  removing CD from the reaction 
D)  All of these changes will increase K.

Question 13

Which is an incorrect statement when discussing molecular collisions leading to the chemical reaction,AB + CD $\rarr$ AD + CB?

Accepted Answer

A)  The faster the motion of the molecules,the more likely they are to collide. 
B)  The faster the motion of the molecules,the greater the probability that a chemical reaction will occur. 
C)  The slower the motion of the molecules,the more likely that this reaction will become an equilibrium reaction favoring the left side of the equation. 
D)  The relationship between molecular collisions and reaction rate is direct. 
A)  The faster the motion of the molecules,the more likely they are to collide. 
B)  The faster the motion of the molecules,the greater the probability that a chemical reaction will occur. 
C)  The slower the motion of the molecules,the more likely that this reaction will become an equilibrium reaction favoring the left side of the equation. 
D)  The relationship between molecular collisions and reaction rate is direct.

Question 14

Equilibrium:
The following question(s)refer to the equilibrium given below in which all reactants and products are gases.
CHS1U1B14S1U1B0 + HS1U1B12S1U1B0O   CHS1U1B13S1U1B0OH + HS1U1B12S1U1B0 + heat
Indicate the effect of the changing condition on the position of equilibrium.
-Refer to Equilibrium.Add a catalyst to the mixture.

Accepted Answer

A)  shifts left 
B)  shifts right 
C)  no effect 
D)  can shift to right or left 
A)  shifts left 
B)  shifts right 
C)  no effect 
D)  can shift to right or left

Question 15

When the equilibrium expression is written for the reaction
N2(g)+ 3F2(g)  
2NF3(g)
What is the exponent of the concentration of fluorine,F2?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  0 
A)  1 
B)  2 
C)  3 
D)  0

Question 16

If we remove CO2 from the following equation,which way will the equilibrium shift?
CO + H2O + heat  
CO2 + H2

Accepted Answer

A)  to the left 
B)  will have no effect 
C)  to the right 
D)  not enough information 
A)  to the left 
B)  will have no effect 
C)  to the right 
D)  not enough information

Question 17

The effect of a catalyst is to eliminate the activation energy requirement of chemical reactions.

Accepted Answer

A) True 
 B)False

Question 18

Decreasing the temperature will decrease the number of effective collisions.

Accepted Answer

A) True 
 B)False

Question 19

Which statement applies to equilibria in general?

Accepted Answer

A)  The larger the value of K,the closer the amounts of matter on the right and left will be equal. 
B)  The larger the value of K,the greater the amount of matter on the right. 
C)  The larger the value of K,the greater the amount of matter on the left. 
D)  None of these responses are correct because reactions at equilibrium have equal amounts of matter on the left and the right sides of the equation. 
A)  The larger the value of K,the closer the amounts of matter on the right and left will be equal. 
B)  The larger the value of K,the greater the amount of matter on the right. 
C)  The larger the value of K,the greater the amount of matter on the left. 
D)  None of these responses are correct because reactions at equilibrium have equal amounts of matter on the left and the right sides of the equation.

Question 20

The products of an exothermic reaction contain less energy than do the reactants.

Accepted Answer

A) True 
 B)False

Exam 8: Reaction Rates and Equilibrium

What would be the effect of doubling the pressure on the following equilibrium system? N2(g)+ 3F2(g) 2NF3(g)

The only way to increase the rate of a reaction is to increase the concentration of the reactants.

A catalyzed,aqueous chemical reaction occurs.Which of the following conditions will reach completion the soonest?

The device used to measure heat produced or used by a chemical reaction is called a(n)_____ .

Ice has a(n)____ entropy than that of liquid water.

Increasing the concentration of a reactant will increase the number of effective collisions.

A reaction is spontaneous when the conditions are

A patient complains about having painful muscle spasms after working on a very hot day.The patient's skin is moist and cool,heart rate is near normal as well as his/her body temperature.What should you not do for them?

If the reaction A + B →\rarr→ C is exothermic,the concentration of C should increase with increasing temperature.

Which of the following is an endergonic process?

Activation energy is the total energy released when a reaction takes place.

For the following reaction,which of the given changes will increase the value of the equilibrium constant? AB + CD AD + BC + heat

Which is an incorrect statement when discussing molecular collisions leading to the chemical reaction,AB + CD →\rarr→ AD + CB?

Equilibrium: The following question(s)refer to the equilibrium given below in which all reactants and products are gases. CH4 + H2O CH3OH + H2 + heat Indicate the effect of the changing condition on the position of equilibrium. -Refer to Equilibrium.Add a catalyst to the mixture.

When the equilibrium expression is written for the reaction N2(g)+ 3F2(g) 2NF3(g) What is the exponent of the concentration of fluorine,F2?

If we remove CO2 from the following equation,which way will the equilibrium shift? CO + H2O + heat CO2 + H2

The effect of a catalyst is to eliminate the activation energy requirement of chemical reactions.

Decreasing the temperature will decrease the number of effective collisions.

Which statement applies to equilibria in general?

The products of an exothermic reaction contain less energy than do the reactants.

Matter, measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Acids,bases,and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

What would be the effect of doubling the pressure on the following equilibrium system? N₂(g)+ 3F₂(g) 2NF₃(g)

If the reaction A + B $\rarr$ C is exothermic,the concentration of C should increase with increasing temperature.

Which is an incorrect statement when discussing molecular collisions leading to the chemical reaction,AB + CD $\rarr$ AD + CB?

Equilibrium: The following question(s)refer to the equilibrium given below in which all reactants and products are gases. CH₄ + H₂O CH₃OH + H₂ + heat Indicate the effect of the changing condition on the position of equilibrium. -Refer to Equilibrium.Add a catalyst to the mixture.

When the equilibrium expression is written for the reaction N₂(g)+ 3F₂(g) 2NF₃(g) What is the exponent of the concentration of fluorine,F₂?

If we remove CO₂ from the following equation,which way will the equilibrium shift? CO + H₂O + heat CO₂ + H₂