For the gaseous phase reaction, N2 + O2 ⇌ 2NO, ΔH = + 80 kJ/kg. mole; the decomposition of NO is favoured by____________________?
Correct answer: D. Decrease in temperature
- A. Increasing the concentration of N2
- B. Decrease in pressure
- C. Increase in pressure
- D. Decrease in temperature
Explanation
Formation of NO is endothermic, so the reverse decomposition is exothermic and is favoured by lowering the temperature. Pressure has no equilibrium effect because both sides contain two moles of gas.
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