Phosphorous and chlorine gases combine to produce phosphorous trichloride: P₂ (g) + 3Cl₂ (g) → 2PCl₃ (g)
ΔG° at 298 K for this reaction is -642.9 kJ/mol. The value of ΔG at 298 K for a reaction mixture that consists of 1.5 atm P₂, 1.6 atm Cl₂, and 0.65 atm PCl₃ is __________.

Question

Quizplus · Accepted Answer

The reaction quotient Q can be calculated using the partial pressures: Q = (PCl3)^2 / (P2)(Cl2)^3. Then, use the formula ΔG = ΔG° + RTlnQ to find ΔG. Given ΔG° = -642.9 kJ/mol, R = 8.314 J/mol·K, and T = 298 K, the calculation results in ΔG ≈ -649.5 kJ/mol.

Phosphorous and Chlorine Gases Combine to Produce Phosphorous Trichloride: P2

Phosphorous and Chlorine Gases Combine to Produce Phosphorous Trichloride: P₂