At 25 °C, the standard free energy change for the gas-phase reaction of hydrogen and nitrogen to for — Thermodynamics Chemistry Question
Question
At 25 °C, the standard free energy change for the gas-phase reaction of hydrogen and nitrogen to form NH3 is –33.0 kJ mol–1.
N2(g) + 3 H2(g) → 2 NH3(g) ∆G° = –33 kJ mol–1
Under what circumstances is ∆G > 0 at 298 K?
A.✓ Correct
Partial pressures of N2 and H2 = 0.1 bar, partial pressure of NH3 = 10 bar
B.
Partial pressures of N2 and H2 = 10 bar, partial pressure of NH3 = 0.1 bar
C.
All partial pressures = 1 × 10–2 bar
D.
Under no possible circumstances
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