5. The H2 + Br2 reaction mechanism involves free radical carriers, molecules, or atoms with one or more unpaired electrons. Given the following possible elementary processes:Show that the overall reaction rate isand in the process evaluate A and B in terms of k1, k1, k2, ......(20%)

4. The organic molecule benzene, C6H6, has a cyclic structure where the carbon atoms make a hexagon. The st electrons in the cyclic molecule can be approximated as having two-dimensional rotational motion. Calculate the diameter of this electron ring if it is assumed that a transition occurring at 260.0 nm corresponds to an electron going from m = 3 to m = 4. X-ray diffraction studies show that benzene is a completely flat and symmetrical molecule with all carbon-carbon and carbon-hydrogen bonds in benzene have lengths of 0.139 nm and 0.110 nm, respectively. Compare your result with the experimental data by X-ray and electron diffraction.(20%)

5. The H₂ + Br₂ reaction mechanism involves free radical carriers, molecules, or atoms with one or more unpaired electrons. Given the following possible elementary processes:
Show that the overall reaction rate is
and in the process evaluate A and B in terms of k₁, k₁, k₂, ......(20%)

相關申論題

相關試卷