Question

Why is water absorbed during making of HCL​

Answer 1

Answer:

The absorption of hydrogen chloride into water generates a great deal of heat which has to be removed from the system. The theoretical maximum concentration achievable is dependent on the temperature and the partial pressure of HCI in the exhaust gas entering the plant.

Answer 2

Answer:

ABSORPTION OF HCL IN WATER

The absorption of hydrogen chloride in water is strongly exothermic ~2100 kJ/kg HCl, which means that the absorption liquid becomes easily warm. High concentrations of HCl in water can be achieved only at temperatures lower than 40°C.In order to keep these low temperatures the removal of absorption energy is necessary. This removal is done in different ways, as further described as isothermal and adiabatic HCl-absorption.