A 50,000 L/day stream of wastewater must be heated from 15 degrees celsius to 40 degrees celsius for a treatment process to work properly. at what rate must we put heat into the stream? assume that wastewater has thermal properties exactly like pure water and the efficiency of heat transfer is 100%. now assume that a steam heater is used to heat the wastewater. calculate the heat that must be contained in steam in order to transfer the required amount of heat into the water stream. assume that the heater has heat losses to the surroundings of 15%. now assume that the steam is produced in a furnace burning a fuel oil that is similar in heat content to crude oil (6.33 * 10^6 kJ/B). assume that the production of steam from the chemical potential energy in the oil has a thermal efficiency of 60%; the remaining heat goes out the stack with the hot gases, or is lost through the hot walls of the pipes or furnace, or other places. calculate the required hourly feed rate of oil, in gallons/hour.