Question 1

Match the following.
-A process or reaction which releases heat

Accepted Answer

A)  exergonic
B)  endergonic
C)  exothermic
D)  endothermic
E)  activation energyF) chemical equilibrium

Question 2

The function of a catalyst in a reaction system is to

Accepted Answer

A)  increase the yield of product.
B)  decrease the amount of heat produced.
C)  decrease the amount of energy consumed in the reaction.
D)  increase the rate of the reaction.
E)  decrease the amount of reactants consumed.

Question 3

A process or reaction which releases heat to the surroundings is said to be

Accepted Answer

A)  conservative.
B)  endothermic.
C)  exothermic.
D)  isothermal.
E)  exergonic.

Question 4

Entropy can be defined as

Accepted Answer

A)  the amount of energy required to rearrange chemical bonds.
B)  the amount of energy required to initiate a reaction.
C)  the number of chemical bonds which are changed during a reaction.
D)  the state of equilibrium in a system.
E)  the amount of disorder in a system.

Question 5

Sketch a diagram to illustrate the role of orientation in determining whether a collision between molecules of two different diatomic elements will lead to formation of a compound.How could you illustrate the influence of energy considerations on this reaction?

Accepted Answer

The diagram should show the two diatomic...

Question 6

-For a chemical reaction to occur,all of the following must happen except

Accepted Answer

A)  chemical bonds in the reactants must break.
B)  reactant particles must collide with enough energy for change to occur.
C)  reactant particles must collide with the correct orientation.
D)  a large enough number of collisions must occur.
E)  chemical bonds in the products must form.

Question 7

Match the following.
-A process or reaction that has a negative value of ΔG

Accepted Answer

A)  exergonic
B)  endergonic
C)  exothermic
D)  endothermic
E)  activation energyF) chemical equilibrium

Question 8

Which of the following will affect all reaction rates?

Accepted Answer

A)  the temperature of the reactants
B)  the concentrations of the reactants
C)  the presence of a catalyst
D)  All are correct.

Question 9

Which of the following statements can be assumed to be true about how reactions occur?

Accepted Answer

A)  Catalysts must be present in the reaction.
B)  Energy must be absorbed as the reaction proceeds.
C)  Reactant particles must collide with each other.
D)  More than one statement can be true.

Question 10

S + O2 → SO2 ΔH = -70.8 kcal
Based on the reaction shown,which statement is true?

Accepted Answer

A)  70.8 kcal are produced when 1 g of sulfur reacts.
B)  70.8 kcal are consumed when 1 g of sulfur reacts.
C)  70.8 kcal are produced when 32.1 g of sulfur reacts.
D)  70.8 kcal are consumed when 32.1 g of sulfur reacts.
E)  70.8 kcal are produced when 1 g of sulfur dioxide is produced.

Question 11

A process which is unfavorable with respect to enthalpy,but favorable with respect to entropy

Accepted Answer

A)  could occur at low temperatures,but not at higher temperatures.
B)  could occur at high temperatures,but not at lower temperatures.
C)  could not occur regardless of temperature.
D)  could occur at any temperature.
E)  none of the above

Question 12

Consider the reaction shown:
N2 + O2 → 2 NO ΔH = 43.2 kcal
When 50.0 g of N2 react,________ kcal will be ________.

Accepted Answer

A)  43.2; produced
B)  77.1; consumed
C)  77.1; produced
D)  2160; consumed
E)  2160; produced

Question 13

For the following reaction,increasing the pressure will cause the equilibrium to ________.
2 SO2 (g) + O2 (g)  2 (g) + O2 (g)    2 SO3 (g) + heat A) shift to the right,towards products B) shift to the left,towards reactants C) remain unchanged,but the reaction mixture will get warmer D) remain unchanged,but the reaction mixture will get cooler E) Pressure has no effect on equilibrium." class="answers-bank-image d-inline" rel="preload" >
2 SO3 (g) + heat

Accepted Answer

A)  shift to the right,towards products
B)  shift to the left,towards reactants
C)  remain unchanged,but the reaction mixture will get warmer
D)  remain unchanged,but the reaction mixture will get cooler
E)  Pressure has no effect on equilibrium.

Exam 7: Chemical Reactions: Energy, rates, and Equilibrium

Entropy can be defined as

Correct Answer
verified

S + O₂ → SO₂ ΔH = -70.8 kcal Based on the reaction shown,which statement is true?

Correct Answer
verified

Match the following. -A process or reaction which releases heat

Correct Answer
verified

For the following reaction,increasing the pressure will cause the equilibrium to ________. 2 SO₂ (g) + O₂ (g) 2 SO₃ (g) + heat

Correct Answer
verified

Sketch a diagram to illustrate the role of orientation in determining whether a collision between molecules of two different diatomic elements will lead to formation of a compound.How could you illustrate the influence of energy considerations on this reaction?

Correct Answer
verified
The diagram should show the two diatomic...
View Answer

A process or reaction which releases heat to the surroundings is said to be

Correct Answer
verified

Match the following. -A process or reaction that has a negative value of ΔG

Correct Answer
verified

Which of the following statements can be assumed to be true about how reactions occur?

Correct Answer
verified

Which of the following will affect all reaction rates?

Correct Answer
verified

A process which is unfavorable with respect to enthalpy,but favorable with respect to entropy

Correct Answer
verified

The function of a catalyst in a reaction system is to

Correct Answer
verified

Consider the reaction shown: N₂ + O₂ → 2 NO ΔH = 43.2 kcal When 50.0 g of N₂ react, kcal will be .

Correct Answer
verified

-For a chemical reaction to occur,all of the following must happen except

Correct Answer
verified

Exam 7: Chemical Reactions: Energy, rates, and Equilibrium

Entropy can be defined as

Correct AnswerverifiedShow Answer

S + O2 → SO2 ΔH = -70.8 kcal Based on the reaction shown,which statement is true?

Correct AnswerverifiedShow Answer

Match the following. -A process or reaction which releases heat

Correct AnswerverifiedShow Answer

For the following reaction,increasing the pressure will cause the equilibrium to ________. 2 SO2 (g) + O2 (g) 2 SO3 (g) + heat

Correct AnswerverifiedShow Answer

Sketch a diagram to illustrate the role of orientation in determining whether a collision between molecules of two different diatomic elements will lead to formation of a compound.How could you illustrate the influence of energy considerations on this reaction?

Correct AnswerverifiedThe diagram should show the two diatomic...View AnswerShow Answer

A process or reaction which releases heat to the surroundings is said to be

Correct AnswerverifiedShow Answer

Match the following. -A process or reaction that has a negative value of ΔG

Correct AnswerverifiedShow Answer

Which of the following statements can be assumed to be true about how reactions occur?

Correct AnswerverifiedShow Answer

Which of the following will affect all reaction rates?

Correct AnswerverifiedShow Answer

A process which is unfavorable with respect to enthalpy,but favorable with respect to entropy

Correct AnswerverifiedShow Answer

The function of a catalyst in a reaction system is to

Correct AnswerverifiedShow Answer

Consider the reaction shown: N2 + O2 → 2 NO ΔH = 43.2 kcal When 50.0 g of N2 react,________ kcal will be ________.

Correct AnswerverifiedShow Answer

-For a chemical reaction to occur,all of the following must happen except

Correct AnswerverifiedShow Answer

Correct Answer
verified

S + O₂ → SO₂ ΔH = -70.8 kcal Based on the reaction shown,which statement is true?

Correct Answer
verified

Correct Answer
verified

For the following reaction,increasing the pressure will cause the equilibrium to ________. 2 SO₂ (g) + O₂ (g) 2 SO₃ (g) + heat

Correct Answer
verified

Correct Answer
verified
The diagram should show the two diatomic...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Consider the reaction shown: N₂ + O₂ → 2 NO ΔH = 43.2 kcal When 50.0 g of N₂ react, kcal will be .

Correct Answer
verified

Correct Answer
verified