3. A liquid that can be treated as water is being well mixed by a stirrer in a 1 m' vessel. The stirrer introduces 300 W of power into the vessel. The heat transfer from the tank to the surroundings...

Extracted text: 3. A liquid that can be treated as water is being well mixed by a stirrer in a 1 m' vessel. The stirrer introduces 300 W of power into the vessel. The heat transfer from the tank to the surroundings is proportional to the temperature difference between the vessel and the surroundings (which are at 20°C). The flow rate of liquid in and out of the tank is 1 kg/min. If the temperature of the inlet liquid is 40°C, what is the temperature of the outlet liquid? The proportionality constant for the heat transfer is 100 W/°C.