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The Reaction Quotient

Q. The equilibrium constant, Kp, equals 3.40 at 25°C for the isomerization reaction: cis-2-butene ⇌ trans-2-butene. If a flask initially contains 2.00 atm of each gas, in what direction will the system shift to reach equilibrium? A) It will shift left. B) It will shift right. C) The system is not at equilibrium and will remain in an unequilibrated state. D) The system is already at equilibrium.

Solved • Jul 2, 2019

The Reaction Quotient

Q. 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] = 4.80 M, [O2] = 0.45 M, and [SO3] = 7.20 M, the system is A) at equilibrium. B) not at equilibrium and will shift to the left to achieve an equilibrium state. C) not at equilibrium and will remain in an unequilibrated state. D) not at equilibrium and will shift to the right to achieve an equilibrium state.

Solved • Jul 2, 2019

The Reaction Quotient

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

Solved • Jul 2, 2019

The Reaction Quotient

Q. 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 0.100 M, respectively. A) [C6H12] = 0.138 and [CH3C5H9] = 0.162 M B) [C6H12] = 0.282 and [CH3C5H9] = 0.018 M C) [C6H12] = 0.262 M and [CH3C5H9] = 0.038 M D) [C6H12] = 0.0625 and [CH3C5H9] = 0.062 M

Solved • Jul 1, 2019

The Reaction Quotient

Q. Cyclohexane (C6H12) undergoes a molecular rearrangement in the presence of AlCl3 to form methylcyclopentane (CH3C5H9) according to the equation: C6H12 ⇌ CH3C5H9 IfKc = 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 0.100 M, respectively. A) [C6H12] = 0.262 M and [CH3C5H9] = 0.038 M B) [C6H12] = 0.0625 and [CH3C5H9] = 0.062 M C) [C6H12] = 0.282 and [CH3C5H9] = 0.018 M D) [C6H12] = 0.138 and [CH3C5H9] = 0.162 M

Solved • Jul 1, 2019

The Reaction Quotient

Q. Kp is equal to 48.70 at 731 K for the reaction: H2(g) + I2(g) ⇌ 2 HI(g). Initially the mixture contains 0.08592 atm each of H2 and I2 and 1.0000 atm of HI. What is the pressure of HI at equilibrium? A) 0.7955 atm B) 0.9498 atm C) 0.9140 atm D) 0.9108 atm

Solved • Jul 1, 2019

The Reaction Quotient

Q. At a certain temperature, bromine and nitric oxide react to form nitrosyl bromide: Br2(g) + 2 NO(g) ⇌ 2 NOBr(g). When initial amounts of Br2, NO, and NOBr are mixed, the concentration of NOBr increases. Which statement below is true? A) Kc > Q B) Kc = Q C) Kc < Q D) More information is needed to make a statement about Kc.

Solved • Jul 1, 2019