Consider the reversible reaction at equilibrium: N2(g)+ O2(g) 2 NO(g). What is the effect of removing some N2(g)from the equilibrium system?

A) The concentration of O2(g)increases B) The concentration of O2(g)decreases C) The concentration of NO(g)increases D) The equilibrium system shifts to the right A) The concentration of O2(g)increases B) The concentration of O2(g)decreases C) The concentration of NO(g)increases D) The equilibrium system shifts to the right

Consider the reaction,3 NO2(g)+ H2O(l)→ 2 HNO3(aq)+ NO(g),where ΔH = -137 kJ. How many kilojoules are released when 92.3 g of NO2 reacts?

A) 2.01 kJ are released B) 2.75 × 102 kJ are released C) 91.6 kJ are released D) 1.26 × 104 kJ are released A) 2.01 kJ are released B) 2.75 × 102 kJ are released C) 91.6 kJ are released D) 1.26 × 104 kJ are released

An equilibrium constant with a value of 8.0 × 106 indicates that at equilibrium ________.

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

Exam 6: Energy Changes,reaction Rates,and Equilibrium

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The reversible reaction: PCl₃(g)+ Cl₂(g) PCl₅(g),has K = 0.5. Based on the molecular art shown below,what can be inferred about the reaction conditions?

(Multiple Choice)

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Question 81

When the pressure of a reaction at equilibrium decreases,in which direction does the equilibrium shift?

(Multiple Choice)

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Question 82

The equilibrium constant expression for the reversible reaction: CHCl₃(g)+ 3 HCl(g) CH₄(g)+ 3 Cl₂(g)is .

(True/False)

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Question 83

When the equilibrium constant for a reaction is much less than one (K < 1),the concentration of the products is larger than the concentration of the reactants.

(True/False)

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Question 84

Changes in potential energy occur in chemical reactions.

(True/False)

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Question 85

One step in the metabolism of glucose is depicted below. Which statement best describes how the equilibrium system would respond if the amount of dihydroxyacetone phosphate is decreased?

(Multiple Choice)

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Question 86

Once equilibrium is reached in a chemical reaction,reactants stop forming products.

(True/False)

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Question 87

A reversible reaction in which K = 9.65 × 10^-14 contains a negligible amount of reactants at equilibrium.

(True/False)

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Question 88

The ΔH for the reaction depicted by the energy diagram below is ________.

(Short Answer)

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Question 89

Consider the reversible reaction at equilibrium: N₂(g)+ O₂(g) 2 NO(g). What is the effect of removing some N₂(g)from the equilibrium system?

(Multiple Choice)

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Question 90

Which of the following is ALWAYS necessary for a chemical reaction to occur between two reactants,A and B?

(Multiple Choice)

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Question 91

When reactants can come together and form products,and products can come together to re-form reactants,the reaction is called a ________ reaction.

(Short Answer)

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Question 92

Heat is absorbed in an ________ reaction.

(Short Answer)

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Question 93

Bond breaking is endothermic.

(True/False)

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Question 94

Le Châtelier's principle is a general rule used to explain the effect of a change in reaction conditions on equilibrium.

(True/False)

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Question 95

In order to cause an endothermic equilibrium reaction to shift in a direction to form more products,the reaction must be heated.

(True/False)

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Question 96

Consider the reaction,3 NO₂(g)+ H₂O(l)→ 2 HNO₃(aq)+ NO(g),where ΔH = -137 kJ. How many kilojoules are released when 92.3 g of NO₂ reacts?

(Multiple Choice)

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Question 97

A chemical reaction requires 31.39 kJ. How many kilocalories does this correspond to?

(Multiple Choice)

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Question 98

Bond dissociation energies are always positive numbers.

(True/False)

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Question 99

An equilibrium constant with a value of 8.0 × 10⁶ indicates that at equilibrium ________.

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Question 100

Showing 81 - 100 of 102

Exam 6: Energy Changes,reaction Rates,and Equilibrium

The reversible reaction: PCl3(g)+ Cl2(g) PCl5(g),has K = 0.5. Based on the molecular art shown below,what can be inferred about the reaction conditions?

When the pressure of a reaction at equilibrium decreases,in which direction does the equilibrium shift?

The equilibrium constant expression for the reversible reaction: CHCl3(g)+ 3 HCl(g) CH4(g)+ 3 Cl2(g)is .

When the equilibrium constant for a reaction is much less than one (K < 1),the concentration of the products is larger than the concentration of the reactants.

Changes in potential energy occur in chemical reactions.

One step in the metabolism of glucose is depicted below. Which statement best describes how the equilibrium system would respond if the amount of dihydroxyacetone phosphate is decreased?

Once equilibrium is reached in a chemical reaction,reactants stop forming products.

A reversible reaction in which K = 9.65 × 10-14 contains a negligible amount of reactants at equilibrium.

The ΔH for the reaction depicted by the energy diagram below is ________.

Consider the reversible reaction at equilibrium: N2(g)+ O2(g) 2 NO(g). What is the effect of removing some N2(g)from the equilibrium system?

Which of the following is ALWAYS necessary for a chemical reaction to occur between two reactants,A and B?

When reactants can come together and form products,and products can come together to re-form reactants,the reaction is called a ________ reaction.

Heat is absorbed in an ________ reaction.

Bond breaking is endothermic.

Le Châtelier's principle is a general rule used to explain the effect of a change in reaction conditions on equilibrium.

In order to cause an endothermic equilibrium reaction to shift in a direction to form more products,the reaction must be heated.

Consider the reaction,3 NO2(g)+ H2O(l)→ 2 HNO3(aq)+ NO(g),where ΔH = -137 kJ. How many kilojoules are released when 92.3 g of NO2 reacts?

A chemical reaction requires 31.39 kJ. How many kilocalories does this correspond to?

Bond dissociation energies are always positive numbers.

An equilibrium constant with a value of 8.0 × 106 indicates that at equilibrium ________.

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The reversible reaction: PCl₃(g)+ Cl₂(g) PCl₅(g),has K = 0.5. Based on the molecular art shown below,what can be inferred about the reaction conditions?

The equilibrium constant expression for the reversible reaction: CHCl₃(g)+ 3 HCl(g) CH₄(g)+ 3 Cl₂(g)is .

A reversible reaction in which K = 9.65 × 10^-14 contains a negligible amount of reactants at equilibrium.

Consider the reversible reaction at equilibrium: N₂(g)+ O₂(g) 2 NO(g). What is the effect of removing some N₂(g)from the equilibrium system?

Consider the reaction,3 NO₂(g)+ H₂O(l)→ 2 HNO₃(aq)+ NO(g),where ΔH = -137 kJ. How many kilojoules are released when 92.3 g of NO₂ reacts?

An equilibrium constant with a value of 8.0 × 10⁶ indicates that at equilibrium ________.