The processes of solid polyethyleneoxide (PEO), polyethylene (PE), and trans-1,4-polybutadiene (PB) formation at solid catalysts in gas-solid systems with no solvent are studied. For a monomer pressure of 760 Torr, maximum rates of 1.5-10(-7), 1.2-10(-5), and 4.10(-7) (mol/s cm(3)) are fixed for C2H4O, C2H4, and 1,4-C(4)H(6)polymerization, respectively; therewith, potentialities of intensification of the reactions are not exhausted. The DeltaH(298)(0) values measured for the reaction (MON)((gas)) = (1/n)(-MON-)(n(solid)) (MON is a monomer molecule) are -107.5 +/- 2.5, -112.5 +/- 2.5, and -140.5 +/- 3.8 (kJ/mol) for PE, PB, and PEO, respectively.