The series of reactions described seems to involve the transformation of ethylene $C2H4$ ultimately into water $H2O$ with the use of various reactants and catalysts. Here is the breakdown of the reactions:

C2H4 $ethylene$ reacts with HCl $hydrochloricacid$ to form an intermediate compound X1.Compound X1 then reacts with sodium $Na$ to form compound X2, accompanied by the release of other by-products or heat $indicatedb{y}^{\prime }{t}^{\prime }fortemperature$.Compound X2 reacts with aluminum chloride $AlCl3$ to form compound X3, while releasing hydrogen gas $H2$ and additional heat $temperatureindicatedb{y}^{\prime }{t}^{\prime }$.Compound X3 undergoes further reactions, resulting in the formation of water $H2O$ and sulfuric acid $H2SO4$, with hydrogen gas as one of the by-products.The final product is water $H2O$ indicated by X5.

Overall, the reactions involve the conversion of ethylene through intermediary compounds with the use of different reactants and catalysts to eventually yield water as the final product.