Ammonium bromide is a crystalline solid that decomposes endothermically when heated: NH4Br(s)⇌ NH3(g)+ HBr(g).When solid NH4Br is added to an evacuated flask at 300°C,which change in reaction conditions below will cause the equilibrium to shift to the right?

A) add more NH3 B) add more NH4Br C) decrease the temperature D) double the volume of the container A) add more NH3 B) add more NH4Br C) decrease the temperature D) double the volume of the container D

Calcium carbonate is relatively insoluble and the dissolution reaction is endothermic: CaCO3(s)⇌ Ca2+(aq)+ CO32-(aq).Which change in reaction condition below will shift the equilibrium to the right?

A) add an acid to react with CO32- ion B) add an anion with which Ca2+ is even less soluble than calcium carbonate C) increase the temperature D) All of these will shift reaction to the right. A) add an acid to react with CO32- ion B) add an anion with which Ca2+ is even less soluble than calcium carbonate C) increase the temperature D) All of these will shift reaction to the right. D

Nickel metal can be prepared by the reduction of nickel oxide: NiO(s)+ CO(g)⇌ CO2(g)+ Ni(s) At 936 K,Kp = 4.54 × 103 and at 1125 K,Kp = 1.58 × 103.Which statement is true?

A) The activation energy decreases with increasing temperature. B) The activation energy increases with increasing temperature. C) The reaction is endothermic. D) The reaction is exothermic. A) The activation energy decreases with increasing temperature. B) The activation energy increases with increasing temperature. C) The reaction is endothermic. D) The reaction is exothermic.

The decomposition of ammonia is: 2 NH3(g)= N2(g)+ 3 H2(g).If Kp is 1.5 × 103 at 400°C,what is the partial pressure of ammonia at equilibrium when N2 is 0.10 atm and H2 is 0.15 atm?

A) 2)2 × 10- 7 atm B) 4)7 × 10- 4 atm C) 2)1 × 103 atm D) 4)4 × 106 atm A) 2)2 × 10- 7 atm B) 4)7 × 10- 4 atm C) 2)1 × 103 atm D) 4)4 × 106 atm

The decomposition of ammonia is: 2 NH3(g)= N2(g)+ 3 H2(g).If Kp is 1.5 × 103 at 400°C,what is the partial pressure of ammonia at equilibrium when N2 is 0.10 atm and H2 is 0.15 atm?

A) 2)2 × 10-7 atm B) 4)7 × 10-4 atm C) 2)1 × 103 atm D) 4)4 × 106 atm A) 2)2 × 10-7 atm B) 4)7 × 10-4 atm C) 2)1 × 103 atm D) 4)4 × 106 atm

Write the equilibrium equation for the forward reaction: 2 CH4(g)+ 3 O2(g)⇌ 2 CO(g)+ 4 H2O(g)

A) Kp = B) Kp= C) Kp = D) Kp = A) Kp = B) Kp= C) Kp = D) Kp =

What is the equilibrium equation for the reaction: NH4NO3(s)⇌ N2O(g)+ 2 H2O(g)?

A) Kp = [N2O] B) Kp = [N2O][H2O] C) Kp = [N2O][H2O]2 D) Kp = A) Kp = [N2O] B) Kp = [N2O][H2O] C) Kp = [N2O][H2O]2 D) Kp =

For the reaction: N2(g)+ 2 O2(g)⇌ 2 NO2(g),Kc = 8.3 × 10-10 at 25°C.What is the concentration of N2 gas at equilibrium when the concentration of NO2 is five times the concentration of O2 gas?

A) 3)3 × 10- 11 M B) 1)7 × 10-10 M C) 6)0 × 109 M D) 3)0 × 1010 M A) 3)3 × 10- 11 M B) 1)7 × 10-10 M C) 6)0 × 109 M D) 3)0 × 1010 M

At a certain temperature the equilibrium constant,Kc,equals 0.11 for the reaction: 2 ICl(g)⇌ I2(g)+ Cl2(g). What is the equilibrium concentration of ICl if 0.75 mol of I2 and 0.75 mol of Cl2 are initially mixed in a 2.0-L flask?

A) 0)23 M B) 0)28 M C) 0)45 M D) 0)56 A) 0)23 M B) 0)28 M C) 0)45 M D) 0)56

If Kc equals 0.11 at 25°C for the reaction: N2O4(g)⇌ 2 NO2(g),what is Kc for the reaction: NO2(g)⇌ 1/2 N2O4(g)?

A) 0)33 B) 3)0 C) 4)5 D) 9)1 A) 0)33 B) 3)0 C) 4)5 D) 9)1

Exam 13: Chemical Equilibrium

Ammonium bromide is a crystalline solid that decomposes endothermically when heated: NH₄Br(s)⇌ NH₃(g)+ HBr(g).When solid NH₄Br is added to an evacuated flask at 300°C,which change in reaction conditions below will cause the equilibrium to shift to the right?

Free

(Multiple Choice)

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Question 1

Correct Answer:

Verified

For the reaction H₂(g)+ S(s)⇌ H₂S(g),if the rate constant for the forward reaction is greater than the rate constant for the reverse reaction,the value of K_c must be ________ (equal to,greater than,less than)1.

Free

(Short Answer)

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Question 2

Correct Answer:

Verified

greater than

Calcium carbonate is relatively insoluble and the dissolution reaction is endothermic: CaCO₃(s)⇌ Ca²⁺(aq)+ CO₃^2-(aq).Which change in reaction condition below will shift the equilibrium to the right?

Free

(Multiple Choice)

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Question 3

Correct Answer:

Verified

The equilibrium constant,K_p,equals 3.40 for the isomerization reaction: Cis-2-butene ⇌ trans-2-butene. If a flask initially contains 0.250 atm of cis-2-butene and 0.145 atm of trans-2-butene,what is the equilibrium pressure of each gas?

(Multiple Choice)

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Question 4

Nickel metal can be prepared by the reduction of nickel oxide: NiO(s)+ CO(g)⇌ CO₂(g)+ Ni(s) At 936 K,K_p = 4.54 × 10³ and at 1125 K,K_p = 1.58 × 10³.Which statement is true?

(Multiple Choice)

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Question 5

Which one of the following statements about the equilibrium constant,K_p,is false?

(Multiple Choice)

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Question 6

The following picture represents the equilibrium state for the reaction A₂ + B₂ ⇌ 2AB.What is the relationship between the rate constant for the forward reaction,k_f,and the rate constant for the reverse reaction k_r?

(Multiple Choice)

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Question 7

The decomposition of ammonia is: 2 NH₃(g)= N₂(g)+ 3 H₂(g).If K_p is 1.5 × 10³ at 400°C,what is the partial pressure of ammonia at equilibrium when N₂ is 0.10 atm and H₂ is 0.15 atm?

(Multiple Choice)

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Question 8

The decomposition of ammonia is: 2 NH₃(g)= N₂(g)+ 3 H₂(g).If K_p is 1.5 × 10³ at 400°C,what is the partial pressure of ammonia at equilibrium when N₂ is 0.10 atm and H₂ is 0.15 atm?

(Multiple Choice)

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Question 9

For a homogeneous equilibrium of gases,which of the following changes in reaction conditions will not alter the equilibrium concentrations?

(Multiple Choice)

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Question 10

Write the equilibrium equation for the forward reaction: 2 CH₄(g)+ 3 O₂(g)⇌ 2 CO(g)+ 4 H₂O(g)

(Multiple Choice)

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Question 11

If K_c is the equilibrium constant for a forward reaction what is K_c´ for the reverse reaction?

(Multiple Choice)

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Question 12

What is the equilibrium equation for the reaction: NH₄NO₃(s)⇌ N₂O(g)+ 2 H₂O(g)?

(Multiple Choice)

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Question 13

For the reaction: 4 HCl(g)+ O₂(g)⇌ 2 Cl₂(g)+ 2 H₂O(l),the equilibrium constant is 0.063 at 400 K.If the reaction quotient is 0.100,which of the following statements is not correct?

(Multiple Choice)

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Question 14

Consider the reaction A + B ⇌ 2 AB.The vessel on the right contains an equilibrium mixture of A atoms (shaded spheres),B atoms (unshaded spheres),and AB molecules. -If the barrier between the two vessels is removed and the contents of the two vessels are allowed to mix,what will be observed?

(Multiple Choice)

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Question 15

For the reaction: N₂(g)+ 2 O₂(g)⇌ 2 NO₂(g),K_c = 8.3 × 10^-10 at 25°C.What is the concentration of N₂ gas at equilibrium when the concentration of NO₂ is five times the concentration of O₂ gas?

(Multiple Choice)

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Question 16

A catalyst increases the overall rate of reaction by lowering the activation energy,E_a,for

(Multiple Choice)

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Question 17

At a certain temperature the equilibrium constant,K_c,equals 0.11 for the reaction: 2 ICl(g)⇌ I₂(g)+ Cl₂(g). What is the equilibrium concentration of ICl if 0.75 mol of I₂ and 0.75 mol of Cl₂ are initially mixed in a 2.0-L flask?

(Multiple Choice)

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Question 18

What is true about the relationship of K_p and K_cfor the reaction: 2 CH₄(g)+ 3 O₂(g)⇌ 2 CO(g)+ 4 H₂O(g)?

(Multiple Choice)

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Question 19

If K_c equals 0.11 at 25°C for the reaction: N₂O₄(g)⇌ 2 NO₂(g),what is K_c for the reaction: NO₂(g)⇌ 1/2 N₂O₄(g)?

(Multiple Choice)

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Question 20

Showing 1 - 20 of 166

Exam 13: Chemical Equilibrium

Ammonium bromide is a crystalline solid that decomposes endothermically when heated: NH4Br(s)⇌ NH3(g)+ HBr(g).When solid NH4Br is added to an evacuated flask at 300°C,which change in reaction conditions below will cause the equilibrium to shift to the right?

For the reaction H2(g)+ S(s)⇌ H2S(g),if the rate constant for the forward reaction is greater than the rate constant for the reverse reaction,the value of Kc must be ________ (equal to,greater than,less than)1.

Calcium carbonate is relatively insoluble and the dissolution reaction is endothermic: CaCO3(s)⇌ Ca2+(aq)+ CO32-(aq).Which change in reaction condition below will shift the equilibrium to the right?

The equilibrium constant,Kp,equals 3.40 for the isomerization reaction: Cis-2-butene ⇌ trans-2-butene. If a flask initially contains 0.250 atm of cis-2-butene and 0.145 atm of trans-2-butene,what is the equilibrium pressure of each gas?

Nickel metal can be prepared by the reduction of nickel oxide: NiO(s)+ CO(g)⇌ CO2(g)+ Ni(s) At 936 K,Kp = 4.54 × 103 and at 1125 K,Kp = 1.58 × 103.Which statement is true?

Which one of the following statements about the equilibrium constant,Kp,is false?

The following picture represents the equilibrium state for the reaction A2 + B2 ⇌ 2AB.What is the relationship between the rate constant for the forward reaction,kf,and the rate constant for the reverse reaction kr?

The decomposition of ammonia is: 2 NH3(g)= N2(g)+ 3 H2(g).If Kp is 1.5 × 103 at 400°C,what is the partial pressure of ammonia at equilibrium when N2 is 0.10 atm and H2 is 0.15 atm?

The decomposition of ammonia is: 2 NH3(g)= N2(g)+ 3 H2(g).If Kp is 1.5 × 103 at 400°C,what is the partial pressure of ammonia at equilibrium when N2 is 0.10 atm and H2 is 0.15 atm?

For a homogeneous equilibrium of gases,which of the following changes in reaction conditions will not alter the equilibrium concentrations?

Write the equilibrium equation for the forward reaction: 2 CH4(g)+ 3 O2(g)⇌ 2 CO(g)+ 4 H2O(g)

If Kc is the equilibrium constant for a forward reaction what is Kc´ for the reverse reaction?

What is the equilibrium equation for the reaction: NH4NO3(s)⇌ N2O(g)+ 2 H2O(g)?

For the reaction: 4 HCl(g)+ O2(g)⇌ 2 Cl2(g)+ 2 H2O(l),the equilibrium constant is 0.063 at 400 K.If the reaction quotient is 0.100,which of the following statements is not correct?

Consider the reaction A + B ⇌ 2 AB.The vessel on the right contains an equilibrium mixture of A atoms (shaded spheres),B atoms (unshaded spheres),and AB molecules. -If the barrier between the two vessels is removed and the contents of the two vessels are allowed to mix,what will be observed?

For the reaction: N2(g)+ 2 O2(g)⇌ 2 NO2(g),Kc = 8.3 × 10-10 at 25°C.What is the concentration of N2 gas at equilibrium when the concentration of NO2 is five times the concentration of O2 gas?

A catalyst increases the overall rate of reaction by lowering the activation energy,Ea,for

At a certain temperature the equilibrium constant,Kc,equals 0.11 for the reaction: 2 ICl(g)⇌ I2(g)+ Cl2(g). What is the equilibrium concentration of ICl if 0.75 mol of I2 and 0.75 mol of Cl2 are initially mixed in a 2.0-L flask?

What is true about the relationship of Kp and Kc for the reaction: 2 CH4(g)+ 3 O2(g)⇌ 2 CO(g)+ 4 H2O(g)?

If Kc equals 0.11 at 25°C for the reaction: N2O4(g)⇌ 2 NO2(g),what is Kc for the reaction: NO2(g)⇌ 1/2 N2O4(g)?

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Ammonium bromide is a crystalline solid that decomposes endothermically when heated: NH₄Br(s)⇌ NH₃(g)+ HBr(g).When solid NH₄Br is added to an evacuated flask at 300°C,which change in reaction conditions below will cause the equilibrium to shift to the right?

For the reaction H₂(g)+ S(s)⇌ H₂S(g),if the rate constant for the forward reaction is greater than the rate constant for the reverse reaction,the value of K_c must be ________ (equal to,greater than,less than)1.

Calcium carbonate is relatively insoluble and the dissolution reaction is endothermic: CaCO₃(s)⇌ Ca²⁺(aq)+ CO₃^2-(aq).Which change in reaction condition below will shift the equilibrium to the right?

The equilibrium constant,K_p,equals 3.40 for the isomerization reaction: Cis-2-butene ⇌ trans-2-butene. If a flask initially contains 0.250 atm of cis-2-butene and 0.145 atm of trans-2-butene,what is the equilibrium pressure of each gas?

Nickel metal can be prepared by the reduction of nickel oxide: NiO(s)+ CO(g)⇌ CO₂(g)+ Ni(s) At 936 K,K_p = 4.54 × 10³ and at 1125 K,K_p = 1.58 × 10³.Which statement is true?

Which one of the following statements about the equilibrium constant,K_p,is false?

The following picture represents the equilibrium state for the reaction A₂ + B₂ ⇌ 2AB.What is the relationship between the rate constant for the forward reaction,k_f,and the rate constant for the reverse reaction k_r?

The decomposition of ammonia is: 2 NH₃(g)= N₂(g)+ 3 H₂(g).If K_p is 1.5 × 10³ at 400°C,what is the partial pressure of ammonia at equilibrium when N₂ is 0.10 atm and H₂ is 0.15 atm?

The decomposition of ammonia is: 2 NH₃(g)= N₂(g)+ 3 H₂(g).If K_p is 1.5 × 10³ at 400°C,what is the partial pressure of ammonia at equilibrium when N₂ is 0.10 atm and H₂ is 0.15 atm?

Write the equilibrium equation for the forward reaction: 2 CH₄(g)+ 3 O₂(g)⇌ 2 CO(g)+ 4 H₂O(g)

If K_c is the equilibrium constant for a forward reaction what is K_c´ for the reverse reaction?

What is the equilibrium equation for the reaction: NH₄NO₃(s)⇌ N₂O(g)+ 2 H₂O(g)?

For the reaction: 4 HCl(g)+ O₂(g)⇌ 2 Cl₂(g)+ 2 H₂O(l),the equilibrium constant is 0.063 at 400 K.If the reaction quotient is 0.100,which of the following statements is not correct?

For the reaction: N₂(g)+ 2 O₂(g)⇌ 2 NO₂(g),K_c = 8.3 × 10^-10 at 25°C.What is the concentration of N₂ gas at equilibrium when the concentration of NO₂ is five times the concentration of O₂ gas?

A catalyst increases the overall rate of reaction by lowering the activation energy,E_a,for

At a certain temperature the equilibrium constant,K_c,equals 0.11 for the reaction: 2 ICl(g)⇌ I₂(g)+ Cl₂(g). What is the equilibrium concentration of ICl if 0.75 mol of I₂ and 0.75 mol of Cl₂ are initially mixed in a 2.0-L flask?

What is true about the relationship of K_p and K_cfor the reaction: 2 CH₄(g)+ 3 O₂(g)⇌ 2 CO(g)+ 4 H₂O(g)?

If K_c equals 0.11 at 25°C for the reaction: N₂O₄(g)⇌ 2 NO₂(g),what is K_c for the reaction: NO₂(g)⇌ 1/2 N₂O₄(g)?