For conversion of oxygen to ozone, 32O2(g)→O3(g) at 298 K, the value of Kp for this conversion is 2.47 × 10–29. The value of  ∆rG⊖ is:

1. 163 kJ mol–1

2. 153 kJ mol–1

3. 178 kJ mol–1  4. 169 kJ mol–1 
Subtopic:  Gibbs Energy Change |
 56%
Level 3: 35%-60%
Hints

Find the equilibrium constant, K, for the following reaction at 298 K:

2NH₃(g) + CO₂(g) ⇌ NH₂CONH₂(aq) + H₂O(l)

Given:

ΔᵣG° = –13.6 kJ mol⁻¹
R = 8.314 J mol⁻¹ K⁻¹
T = 298 K

1. 6.4 × 105 2. 2.4 × 102
3. 4.4 × 102 4. 4.4 × 105
Subtopic:  Gibbs Energy Change |
 66%
Level 2: 60%+
Hints

Determine the standard Gibbs free energy change for N₂O₄ at 60°C when 50% dissociation occurs.

1. -863.8 kJmol-1 2. -652.7 kJmol-1
3. -763.8 kJmol-1 4. -789.9 kJmol-1
Subtopic:  Gibbs Energy Change |
Level 4: Below 35%
Hints

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