Question

N₂O₄ ---> 2NO₂ change in enthalpy = 57.9 KJ , 2NO +O₂ ---> 2NO₂ change in enthalpy -113.1 KJ given the information, calculate the change in enthalpy for 2NO + O₂ --> N₂O₄

Answer 1

The change in enthalpy for 2NO(g) + O₂(g) → N₂O₄(g) is -181 kJ.

Step-by-step explanation:

The given thermochemical equation is N₂(g) + O₂(g) → 2NO(g), with a change in enthalpy of 181 kJ.

Since the enthalpy change for the reverse reaction will be equal in magnitude but opposite in sign, the equation for 2NO(g) + O₂(g) → N₂O₄(g) will have a change in enthalpy of -181 kJ.

Therefore, the change in enthalpy for 2NO(g) + O₂(g) → N₂O₄(g) is -181 kJ.