The standard Gibbs energy of reaction for the thermal decomposition of ammonium chloride is +35.0 kJ mol⁻¹ at 225 °C. Calculate the partial pressure of ammonia gas produced when ammonium chloride is allowed to decompose at a pressure of 1 bar at this temperature.
NH₄Cl (s) → NH₃ (g) + HCl (g)
- 21.2 Pa
- 8.66 Pa
- 21.3 Pa
- 1460 Pa