Consider the following system at equilibrium where AH° = -198 kJ, and K. = 34.5, at 1150 K. %3D %3D 250-(g) + O2(g) 2503(g) When 0.29 moles of O2(g) are removed from the equilibrium system at constant temperature: The value of K. (remains the same. : The value of Q[ is greater than JKc- The reaction must run in the forward direction to restablish equilibrium. o run in the reverse direction to restablish equilibrium. oremain the same. It is already at equilibrium. The concentration of SO2 will ( decrease.

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### Chemical Equilibrium Problem

**Consider the following system at equilibrium where ΔH° = -198 kJ, and Kₒ = 34.5, at 1150 K.**

\[ 2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g) \]

When **0.29 moles of O₂(g)** are **removed** from the equilibrium system at constant temperature:

1. **The value of Kₒ:** 
   - **remains the same.** (Dropdown Selection)

2. **The value of Qₒ:**
   - **is greater than** Kₒ. (Dropdown Selection)

3. **The reaction must:**
   - **run in the reverse direction to reestablish equilibrium.** (Radio Button Selection)

4. **The concentration of SO₂ will:**
   - **decrease.** (Dropdown Selection)

#### Explanation:

1. **Equilibrium Constant (Kᶜ):** 
   - Kᶜ is a constant for a given temperature, so removing O₂ does not change the value of Kᶜ. It remains the same.

2. **Reaction Quotient (Qᶜ):**
   - The reaction quotient Qᶜ is used to determine the direction the reaction must proceed to return to equilibrium. When O₂ is removed, Qᶜ becomes greater than Kᶜ, indicating that the system is no longer at equilibrium.

3. **Direction to Reestablish Equilibrium:**
   - When Qᶜ > Kᶜ, the reaction must shift in the reverse direction (towards reactants) to reestablish equilibrium.

4. **Concentration of SO₂:**
   - To counter the removal of O₂ and shift the reaction towards the reactants, the concentration of SO₂ will decrease as the equilibrium reestablishes itself.
Transcribed Image Text:### Chemical Equilibrium Problem **Consider the following system at equilibrium where ΔH° = -198 kJ, and Kₒ = 34.5, at 1150 K.** \[ 2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g) \] When **0.29 moles of O₂(g)** are **removed** from the equilibrium system at constant temperature: 1. **The value of Kₒ:** - **remains the same.** (Dropdown Selection) 2. **The value of Qₒ:** - **is greater than** Kₒ. (Dropdown Selection) 3. **The reaction must:** - **run in the reverse direction to reestablish equilibrium.** (Radio Button Selection) 4. **The concentration of SO₂ will:** - **decrease.** (Dropdown Selection) #### Explanation: 1. **Equilibrium Constant (Kᶜ):** - Kᶜ is a constant for a given temperature, so removing O₂ does not change the value of Kᶜ. It remains the same. 2. **Reaction Quotient (Qᶜ):** - The reaction quotient Qᶜ is used to determine the direction the reaction must proceed to return to equilibrium. When O₂ is removed, Qᶜ becomes greater than Kᶜ, indicating that the system is no longer at equilibrium. 3. **Direction to Reestablish Equilibrium:** - When Qᶜ > Kᶜ, the reaction must shift in the reverse direction (towards reactants) to reestablish equilibrium. 4. **Concentration of SO₂:** - To counter the removal of O₂ and shift the reaction towards the reactants, the concentration of SO₂ will decrease as the equilibrium reestablishes itself.
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