Indicate whether ΔG increases, decreases, or stays the same for e...

Question

Indicate whether ΔG increases, decreases, or stays the same for each of the following reactions as the partial pressure of O₂ is increased: (a) 2 CO(g) + O₂(g) → 2 CO₂(g) (b) 2 H₂O₂(l) → 2 H₂O(l) + O₂(g) (c) 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g)

Accepted Answer

Step 1: Understand the relationship between Gibbs free energy change (ΔG) and reaction quotient (Q). The equation ΔG = ΔG° + RT ln(Q) shows that ΔG depends on the reaction quotient Q, which is affected by the partial pressures of gases involved in the reaction.. Step 2: For reaction (a) 2 CO(g) + O₂(g) → 2 CO₂(g), increasing the partial pressure of O₂ will decrease Q because O₂ is a reactant. Since Q decreases, ln(Q) becomes more negative, which decreases ΔG, making the reaction more spontaneous.. Step 3: For reaction (b) 2 H₂O₂(l) → 2 H₂O(l) + O₂(g), increasing the partial pressure of O₂ will increase Q because O₂ is a product. Since Q increases, ln(Q) becomes more positive, which increases ΔG, making the reaction less spontaneous.. Step 4: For reaction (c) 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g), increasing the partial pressure of O₂ will increase Q because O₂ is a product. Since Q increases, ln(Q) becomes more positive, which increases ΔG, making the reaction less spontaneous.. Step 5: Summarize the effects: (a) ΔG decreases, (b) ΔG increases, (c) ΔG increases, as the partial pressure of O₂ is increased.

Indicate whether ΔG increases, decreases, or stays the same for each of the following reactions as the partial pressure of O₂ is increased: (a) 2 CO(g) + O₂(g) → 2 CO₂(g) (b) 2 H₂O₂(l) → 2 H₂O(l) + O₂(g) (c) 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g)

Key Concepts

Gibbs Free Energy (ΔG)

Le Chatelier's Principle

Reaction Quotient (Q) and Equilibrium Constant (K)

Indicate whether ΔG increases, decreases, or stays the same for each of the following reactions as the partial pressure of O2 is increased: (a) 2 CO(g) + O2(g) → 2 CO2(g) (b) 2 H2O2(l) → 2 H2O(l) + O2(g) (c) 2 KClO3(s) → 2 KCl(s) + 3 O2(g)

Key Concepts

Gibbs Free Energy (ΔG)

Le Chatelier's Principle

Reaction Quotient (Q) and Equilibrium Constant (K)

Indicate whether ΔG increases, decreases, or stays the same for each of the following reactions as the partial pressure of O₂ is increased: (a) 2 CO(g) + O₂(g) → 2 CO₂(g) (b) 2 H₂O₂(l) → 2 H₂O(l) + O₂(g) (c) 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g)