The reaction AS1U1B12S1U1B0 + BS1U1B12 S1U1B0⇌ 2AB has an equilibrium constant KS1U1B1cS1U1B0 = 1.8.The following pictures represent reaction mixtures that contain AS1U1B12S1U1B0 molecules (shaded)and BS1U1B12S1U1B0 molecules (unshaded),and AB molecules. -Which nonequilibrium mixture will react in the forward direction to reach equilibrium?

A) reaction mixture (1) B) reaction mixture (2) C) reaction mixture (3) D) reaction mixture (4) A) reaction mixture (1) B) reaction mixture (2) C) reaction mixture (3) D) reaction mixture (4)

Ammonium carbamate can dissociate into gases at 25°C according to the reaction: NH2COONH4(s)⇌ 2 NH3(g)+ CO2(g) If sufficient ammonium carbamate is sealed in a flask,the total pressure will be 0.117 atm at equilibrium.What is the value of Kp at 25°C?

A) 2.37 × 10-4 B) 2.00 × 10-4 C) 1.60 × 10-3 D) 3.42 × 10-1 A) 2.37 × 10-4 B) 2.00 × 10-4 C) 1.60 × 10-3 D) 3.42 × 10-1

Write the equilibrium equation for the reverse reaction: 4 CH4 (g)+ 6 O2 (g)⇌ 4 CO (g)+ 8 H2O (g)

A) Kc' = B) Kc' = C) Kc' = D) Kc' = A) Kc' = B) Kc' = C) Kc' = D) Kc' =

Cyclohexane,C6H12,undergoes a molecular rearrangement in the presence of AlCl3 to form methylcyclopentane,CH3C5H9, according to the equation: C6H12 ⇌ CH3C5H9 If Kc = 0.143 at 25°C for this reaction,find the equilibrium concentrations of C6H12 and CH3C5H9 if the initial concentrations are 0.200 M and 0.200 M,respectively.

A) [C6H12] = 0.150 M,[CH3C5H9] = 0.150 M B) [C6H12] = 0.050 M,[CH3C5H9] = 0.162 M C) [C6H12] = 0.350 M,[CH3C5H9] = 0.050 M D) [C6H12] = 0.396 M,[CH3C5H9] = 0.004 M A) [C6H12] = 0.150 M,[CH3C5H9] = 0.150 M B) [C6H12] = 0.050 M,[CH3C5H9] = 0.162 M C) [C6H12] = 0.350 M,[CH3C5H9] = 0.050 M D) [C6H12] = 0.396 M,[CH3C5H9] = 0.004 M

Cyclohexane (C6H12)undergoes a molecular rearrangement in the presence of AlCl3 to form methylcyclopentane (MCP)according to the equation: C6H12 ⇌ MCP If Kc = 0.143 at 25°C for this reaction,predict the direction the reaction will shift if the initial concentrations of C6H12 and MCP are 0.200 M and 0.100 M,respectively.The system

A) will shift left. B) will shift right. C) is already at equilibrium. D) is not at equilibrium and will remain in an unequilibrated state. A) will shift left. B) will shift right. C) is already at equilibrium. D) is not at equilibrium and will remain in an unequilibrated state.

The equilibrium constant is equal to 5.00 at 1300 K for the reaction: 2 SO2(g)+ O2(g)⇌ 2 SO3(g). If initial concentrations are [SO2] = 3.60 M,[O2] = 0.45 M,and [SO3] = 5.40 M,the system is

A) at equilibrium. B) not at equilibrium and will remain in an unequilibrated state. C) not at equilibrium and will shift to the left to achieve an equilibrium state. D) not at equilibrium and will shift to the right to achieve an equilibrium state. A) at equilibrium. B) not at equilibrium and will remain in an unequilibrated state. C) not at equilibrium and will shift to the left to achieve an equilibrium state. D) not at equilibrium and will shift to the right to achieve an equilibrium state.

What is the equilibrium equation for the following reaction? C2H4 (g)+ 3 O2 (g)⇌ 2 CO2 (g)+ 2 H2O (l)

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

Write the equilibrium equation for the forward reaction: 4 CH4 (g)+ 6 O2 (g)⇌ 4 CO (g)+ 8 H2O (g)

A) Kc = B) Kc = C) Kc = D) Kc = A) Kc = B) Kc = C) Kc = D) Kc =

At a certain temperature,bromine and nitric oxide react to form nitrosyl bromide: Br2(g)+ 2 NO(g)⇌ 2 NOBr(g). When 0.010 mol Br2 is mixed with 0.025 mol NO and 0.015 mol NOBr in a 2.50 L flask,the concentration of NOBr decreases.Which statement below is true?

A) Kc c > 36 C) Kc c > 90 A) Kc c > 36 C) Kc c > 90

Exam 14: Chemical Equilibrium

At an elevated temperature,K_p = 4.2 × 10^-9 for the reaction 2 HBr(g)⇌ H₂(g)+ Br₂(g).If the initial partial pressures of HBr,H₂,and Br₂ are 1.0 × 10^-2 atm,2.0 × 10^-4 atm,and 2.0 × 10^-4 atm,respectively,what is the equilibrium partial pressure of H₂?

(Short Answer)

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Question 21

The reaction CaCO₃(s)⇌ CaO(s)+ O₂(g)is endothermic 298 K.The effect of increasing the total volume of the system at equilibrium will ________ (decrease,increase,have no effect on)the total quantity of CaCO₃ once equilibrium is reestablished.

(Short Answer)

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Question 22

Given the reaction: 2 HI ⇌ H₂ + I₂.If K_c^' for the reverse reaction is 1.85 × 10^-2 at 425°C,what is K_c for the forward reaction at the same temperature?

(Multiple Choice)

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Question 23

The reaction A₂ + B₂⇌ 2AB has an equilibrium constant K_c = 1.8.The following pictures represent reaction mixtures that contain A₂ molecules (shaded)and B₂ molecules (unshaded),and AB molecules. -Which nonequilibrium mixture will react in the forward direction to reach equilibrium?

(Multiple Choice)

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Question 24

For the reaction shown below,which change in conditions made to the system at equilibrium will result in a net reaction to the right to form more product? C(s)+ 2 H₂(g)⇌ CH₄(g)ΔH° = - 74.8 kJ

(Multiple Choice)

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Question 25

Ammonium carbamate can dissociate into gases at 25°C according to the reaction: NH₂COONH₄(s)⇌ 2 NH₃(g)+ CO₂(g) If sufficient ammonium carbamate is sealed in a flask,the total pressure will be 0.117 atm at equilibrium.What is the value of K_p at 25°C?

(Multiple Choice)

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Question 26

Write the equilibrium equation for the reverse reaction: 4 CH₄ (g)+ 6 O₂ (g)⇌ 4 CO (g)+ 8 H₂O (g)

(Multiple Choice)

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Question 27

For the reaction,A(g)+ 2 B(g)⇌ 2 C(g),K_c = 5.00 × 10^-10 at 25°C.Which of the following statements is true?

(Multiple Choice)

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Question 28

Given the reaction at a certain temperature: 2 HI(g)⇌ H₂(g)+ I₂(g).At equilibrium,the partial pressure of HI is 1.8 × 10^-3 atm,and the partial pressures for H₂ and I₂ are 0.10 atm each.Find K_p at that temperature.

(Multiple Choice)

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Question 29

Cyclohexane,C₆H₁₂,undergoes a molecular rearrangement in the presence of AlCl₃ to form methylcyclopentane,CH₃C₅H_9, according to the equation: C₆H₁₂ ⇌ CH₃C₅H₉ If K_c = 0.143 at 25°C for this reaction,find the equilibrium concentrations of C₆H₁₂ and CH₃C₅H₉ if the initial concentrations are 0.200 M and 0.200 M,respectively.

(Multiple Choice)

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Question 30

Cyclohexane (C₆H₁₂)undergoes a molecular rearrangement in the presence of AlCl₃ to form methylcyclopentane (MCP)according to the equation: C₆H₁₂ ⇌ MCP If K_c = 0.143 at 25°C for this reaction,predict the direction the reaction will shift if the initial concentrations of C₆H₁₂ and MCP are 0.200 M and 0.100 M,respectively.The system

(Multiple Choice)

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Question 31

For the isomerization reaction: butane ⇌ isobutane K_p equals 25 at 500°C.If the initial pressures of butane and isobutane are 10.atm and 0.0 atm,respectively,what are the pressures of the two gases at equilibrium?

(Multiple Choice)

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Question 32

The equilibrium constant is equal to 5.00 at 1300 K for the reaction: 2 SO₂(g)+ O₂(g)⇌ 2 SO₃(g). If initial concentrations are [SO₂] = 3.60 M,[O₂] = 0.45 M,and [SO₃] = 5.40 M,the system is

(Multiple Choice)

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Question 33

What is the equilibrium equation for the following reaction? C₂H₄ (g)+ 3 O₂ (g)⇌ 2 CO₂ (g)+ 2 H₂O (l)

(Multiple Choice)

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Question 34

Which will alter the composition of an equilibrium mixture?

(Multiple Choice)

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Question 35

The following pictures represent the equilibrium state for four different reactions of the type A atoms are unshaded.X atoms are shaded. -Which reaction has the smallest equilibrium constant?

(Multiple Choice)

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Question 36

Which of the following statements about a catalyst is true?

(Multiple Choice)

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Question 37

What is the equilibrium equation for the dissociation of formic acid in water? HCOOH (aq)+ H₂O (l)⇌ H₃O⁺ (aq)+ HCOO^- (aq)

(Multiple Choice)

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Question 38

Write the equilibrium equation for the forward reaction: 4 CH₄ (g)+ 6 O₂ (g)⇌ 4 CO (g)+ 8 H₂O (g)

(Multiple Choice)

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Question 39

At a certain temperature,bromine and nitric oxide react to form nitrosyl bromide: Br₂(g)+ 2 NO(g)⇌ 2 NOBr(g). When 0.010 mol Br₂ is mixed with 0.025 mol NO and 0.015 mol NOBr in a 2.50 L flask,the concentration of NOBr decreases.Which statement below is true?

(Multiple Choice)

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Question 40

Showing 21 - 40 of 171

Exam 14: Chemical Equilibrium

At an elevated temperature,Kp = 4.2 × 10-9 for the reaction 2 HBr(g)⇌ H2(g)+ Br2(g).If the initial partial pressures of HBr,H2,and Br2 are 1.0 × 10-2 atm,2.0 × 10-4 atm,and 2.0 × 10-4 atm,respectively,what is the equilibrium partial pressure of H2?

The reaction CaCO3(s)⇌ CaO(s)+ O2(g)is endothermic 298 K.The effect of increasing the total volume of the system at equilibrium will ________ (decrease,increase,have no effect on)the total quantity of CaCO3 once equilibrium is reestablished.

Given the reaction: 2 HI ⇌ H2 + I2.If Kc' for the reverse reaction is 1.85 × 10-2 at 425°C,what is Kc for the forward reaction at the same temperature?

The reaction A2 + B2 ⇌ 2AB has an equilibrium constant Kc = 1.8.The following pictures represent reaction mixtures that contain A2 molecules (shaded)and B2 molecules (unshaded),and AB molecules. -Which nonequilibrium mixture will react in the forward direction to reach equilibrium?

For the reaction shown below,which change in conditions made to the system at equilibrium will result in a net reaction to the right to form more product? C(s)+ 2 H2(g)⇌ CH4(g)ΔH° = - 74.8 kJ

Ammonium carbamate can dissociate into gases at 25°C according to the reaction: NH2COONH4(s)⇌ 2 NH3(g)+ CO2(g) If sufficient ammonium carbamate is sealed in a flask,the total pressure will be 0.117 atm at equilibrium.What is the value of Kp at 25°C?

Write the equilibrium equation for the reverse reaction: 4 CH4 (g)+ 6 O2 (g)⇌ 4 CO (g)+ 8 H2O (g)

For the reaction,A(g)+ 2 B(g)⇌ 2 C(g),Kc = 5.00 × 10-10 at 25°C.Which of the following statements is true?

Given the reaction at a certain temperature: 2 HI(g)⇌ H2(g)+ I2(g).At equilibrium,the partial pressure of HI is 1.8 × 10-3 atm,and the partial pressures for H2 and I2 are 0.10 atm each.Find Kp at that temperature.

For the isomerization reaction: butane ⇌ isobutane Kp equals 25 at 500°C.If the initial pressures of butane and isobutane are 10.atm and 0.0 atm,respectively,what are the pressures of the two gases at equilibrium?

The equilibrium constant is equal to 5.00 at 1300 K for the reaction: 2 SO2(g)+ O2(g)⇌ 2 SO3(g). If initial concentrations are [SO2] = 3.60 M,[O2] = 0.45 M,and [SO3] = 5.40 M,the system is

What is the equilibrium equation for the following reaction? C2H4 (g)+ 3 O2 (g)⇌ 2 CO2 (g)+ 2 H2O (l)

Which will alter the composition of an equilibrium mixture?

The following pictures represent the equilibrium state for four different reactions of the type A atoms are unshaded.X atoms are shaded. -Which reaction has the smallest equilibrium constant?

Which of the following statements about a catalyst is true?

What is the equilibrium equation for the dissociation of formic acid in water? HCOOH (aq)+ H2O (l)⇌ H3O+ (aq)+ HCOO- (aq)

Write the equilibrium equation for the forward reaction: 4 CH4 (g)+ 6 O2 (g)⇌ 4 CO (g)+ 8 H2O (g)

At a certain temperature,bromine and nitric oxide react to form nitrosyl bromide: Br2(g)+ 2 NO(g)⇌ 2 NOBr(g). When 0.010 mol Br2 is mixed with 0.025 mol NO and 0.015 mol NOBr in a 2.50 L flask,the concentration of NOBr decreases.Which statement below is true?

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At an elevated temperature,K_p = 4.2 × 10^-9 for the reaction 2 HBr(g)⇌ H₂(g)+ Br₂(g).If the initial partial pressures of HBr,H₂,and Br₂ are 1.0 × 10^-2 atm,2.0 × 10^-4 atm,and 2.0 × 10^-4 atm,respectively,what is the equilibrium partial pressure of H₂?

The reaction CaCO₃(s)⇌ CaO(s)+ O₂(g)is endothermic 298 K.The effect of increasing the total volume of the system at equilibrium will ________ (decrease,increase,have no effect on)the total quantity of CaCO₃ once equilibrium is reestablished.

Given the reaction: 2 HI ⇌ H₂ + I₂.If K_c^' for the reverse reaction is 1.85 × 10^-2 at 425°C,what is K_c for the forward reaction at the same temperature?

The reaction A₂ + B₂⇌ 2AB has an equilibrium constant K_c = 1.8.The following pictures represent reaction mixtures that contain A₂ molecules (shaded)and B₂ molecules (unshaded),and AB molecules. -Which nonequilibrium mixture will react in the forward direction to reach equilibrium?

For the reaction shown below,which change in conditions made to the system at equilibrium will result in a net reaction to the right to form more product? C(s)+ 2 H₂(g)⇌ CH₄(g)ΔH° = - 74.8 kJ

Ammonium carbamate can dissociate into gases at 25°C according to the reaction: NH₂COONH₄(s)⇌ 2 NH₃(g)+ CO₂(g) If sufficient ammonium carbamate is sealed in a flask,the total pressure will be 0.117 atm at equilibrium.What is the value of K_p at 25°C?

Write the equilibrium equation for the reverse reaction: 4 CH₄ (g)+ 6 O₂ (g)⇌ 4 CO (g)+ 8 H₂O (g)

For the reaction,A(g)+ 2 B(g)⇌ 2 C(g),K_c = 5.00 × 10^-10 at 25°C.Which of the following statements is true?

Given the reaction at a certain temperature: 2 HI(g)⇌ H₂(g)+ I₂(g).At equilibrium,the partial pressure of HI is 1.8 × 10^-3 atm,and the partial pressures for H₂ and I₂ are 0.10 atm each.Find K_p at that temperature.

For the isomerization reaction: butane ⇌ isobutane K_p equals 25 at 500°C.If the initial pressures of butane and isobutane are 10.atm and 0.0 atm,respectively,what are the pressures of the two gases at equilibrium?

The equilibrium constant is equal to 5.00 at 1300 K for the reaction: 2 SO₂(g)+ O₂(g)⇌ 2 SO₃(g). If initial concentrations are [SO₂] = 3.60 M,[O₂] = 0.45 M,and [SO₃] = 5.40 M,the system is

What is the equilibrium equation for the following reaction? C₂H₄ (g)+ 3 O₂ (g)⇌ 2 CO₂ (g)+ 2 H₂O (l)

What is the equilibrium equation for the dissociation of formic acid in water? HCOOH (aq)+ H₂O (l)⇌ H₃O⁺ (aq)+ HCOO^- (aq)

Write the equilibrium equation for the forward reaction: 4 CH₄ (g)+ 6 O₂ (g)⇌ 4 CO (g)+ 8 H₂O (g)

At a certain temperature,bromine and nitric oxide react to form nitrosyl bromide: Br₂(g)+ 2 NO(g)⇌ 2 NOBr(g). When 0.010 mol Br₂ is mixed with 0.025 mol NO and 0.015 mol NOBr in a 2.50 L flask,the concentration of NOBr decreases.Which statement below is true?