We have investigated energy pp laws of the intermolecular charge separation (CS) and charge recombination (CR) reactions by considering the distance distribution between donor and acceptor molecules. The experimentally obtained energy gap dependence of the CS reaction rate constant, which shows a large width and flat shape, has been theoretically explained as follows. The sharp increase in the normal region is due to the donor-acceptor molecules in close contact which give the energy pp laws with small widths and are located at small energy gaps. The flat shapes of the top region and the inverted region arc due to the donor-acceptor molecules at large mutual distances which give the energy gap laws with large widths and are located at large energy gaps. The experimentally obtained energy gap law of the CR reaction, which is nearly bell-shaped and located at thc rather large energy gap, cannot be explained by assuming thc same distance distribution as in the CS reaction. A narrow distance distribution of the geminate radical ion pair was necessary for the satisfactory interpretation of the energy gap law of thc CR reaction. It was also shown that the energy gap law of the CR reaction can be reproduced rather well by considering a dynamical process of relaxation of the initial distance distribution of the geminate radical ion pair which is produced by the photoinduced CS reaction.