The kinetics of acetone hydrogenation over 5.0% Pt/SiO2 and 1.9% Pt/TiO2 catalysts, previously characterized by H2 chemisorption, were studied by Sen and Vannice [57]. The dispersion of Pt was 0.31 in the former catalyst and in the latter catalyst, which exhibited SMI behavior, DPt ¼ 0:75. The kinetic parameters at 303 K and 1 atm from a power rate law, TOFIPA (s-1) = Ae-E/RT PXAce PYH2, are given in the table below. Because of the uncertainty in Y, consider it to be unity. Propose a model that yields a derived rate expression consistent with these results knowing that dissociative H2 adsorption occurs on Pt. If more than one reaction model can be proposed which gives acceptable rate expressions, can you evaluate which might be rejected? How regarding the heat of adsorption of an on-top (ת1μ1) acetone species vs. that for a di-s-bonded (ת2μ2) species which has both a C atom and the O atom interacting with a surface metal atom.)