For the reaction below, the enthalpy of reaction is ΔrH = -22.97 kJ mol⁻¹ and the thermodynamic equilibrium constant is K = 2.34 × 10⁻⁶ at 298.15 K. What is the value of K at 256 K?
C(gr.) + 1/2 N₂(g) + 5/2 H₂(g) ⟶ CH₃NH₂(g)
Enter your answer with 3 significant figures.
Enter 1.25×10⁻⁴ as 1.25e-4 and 7.38×10² as 7.38e2.
K = [Number] at 256 K