In an industrial process, a stirrer transfers energy for a period of 40 minutes at a rate of 5 kW to a tank containing 500 liters of liquid, which has

a specific heat of 3.5 kJ/kg K and a relative density of 0.92.Considering the application as a closed system, determine the increase in temperature of the liquid after stirring if There is no heat loss from the mixing tank, (4 marks) The heat loss from tank is 40 % of the input stirrer energy. (3 marks)