(15 marks] The equilibrium constant for the decomposition of hydrogen iodide has been estimated to be 0.0252 at 393C and 0.0168 at 508C. 2 HI) = H2(g) +1268) Estimate: (1) the mean enthalpy for the decomposition of hydrogen iodide (ii) the entropy change for the decomposition at 393C. Comment briefly on your answers. [10 marks) OR Cyclic voltammetry can be used to study diffusion-controlled reversible redox processes. (1) Sketch and label a typical cyclic voltammogram (CV) you would expect to obtain. Give a brief description on the different electrochemical regions labelled in your CV (ii) Sketch a typical labelled diagnostic plot (not a eyelic voltammogram) used to verify that a redox reaction is under diffusion control. [10 marks]