Wetted wall column is employed to separate 95% acetone from air - acetone mixture using pure water. gas flow rate is 2500 m hr and contains 7.5 volume % acetone. water flow rate is 3 kg/m' of pure air, temperature and pressure are 25 °c & i atm. calculate the necessary contact area (in m') if overall mass transfer coefficient is 0.35 kmol/m hr. (mole acetone mole air) the equilibrium relation is y -1.75 x

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.