Water from two branches of a pipeline at mass flow rates of 1 kg/s from each line combines together into a single pipeline One inlet stream is at 70C and the other stream is at 40C. The mixing process can be considered to be steady- state and adiabatic. Kinetic and potential energy changes are negligible. Specific heat capacity of water is 4.2 kJ/kg.K. The rate of entropy production for the mixing process in W/K is