At room temperature (25 °C), the gas ClNO is impure because it decomposes slightly according to the equation

Question

2ClNO(g) Cl2(g) + 2NO(g)

The extent of decomposition is about 4%. Based upon this, the approximate value of ΔG°298 for the reaction at that temperature is

I got my answer 25.4 kJ and 25.5 kJ but both was wrong. Did I do something wrong?

Answer 1

Did you use dGo formation for your values. I don't have those values. Were the two values separate calculations or is the question asking for two different values? I don't see but one question.